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My name is JP, and I’m the founder of SoftwareHow. You’ve probably checked out the about page or maybe some of the tips, guides, and reviews I wrote. So, I’m not going to self-introduce too much here. I’m an Apple fan who owns an old mid-2012 MacBook Pro. I love exploring new technology and figuring out what it has to offer to make our life easier, especially when it comes to being more productive and get more work done.

One of the problems I’ve had with my MacBook often is that the hard drive filled up quickly, and I had to transfer important files to another drive (actually just did so with my Seagate external), clean up unnecessary files, and transfer everything back. To be honest, I hate doing it. It’s boring and time-consuming.

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Is there a better way to handle this issue? Luckily, yes. If you’ve ever used a Windows PC, you probably know there are PC maintenance tools like CCleaner or other registry cleaners. Unlike PCs, Macs don’t have registries and thus don’t need registry cleaner programs. But there are many wonderful apps that help you reclaim storage space by cleaning unused or unnecessary stuff. We call them Mac cleaners.

My teammate Adrian and I have personally used and tested a handful of Mac cleaner apps. Some are free (CCleaner, OnyX, etc.) while others are not (CleanMyMac, DaisyDisk, Drive Genius, etc.). Depending on your specific needs and personal preferences, the best Mac cleaner app for you may vary. In fact, you may not need to use a cleaning app at all if you’re a power Mac user. Anyway, you can read more about our reasons why below.

The “Hype” and Myth of Mac Cleaning

Below are a few statements and misconceptions about Mac cleaning.

1. Your Mac gets “dirty” over time.

This is a general misconception among new Mac users who switch over from PCs. Windows users are accustomed to running a registry cleaner program because of accumulated web browser caches and system junk files, leading to a belief that your PC is dirty. It’s important to understand that macOS is not Windows. The two operating systems should not be viewed the same way. In general, Macs don’t need the same level of system maintenance thanks to its Unix heritage. You can learn more about the subject here.

2. Cleaning the macOS system will make your Mac machine run faster.

You probably have come across some marketing slogans where app developers claim their programs speed up your Mac, boost your Mac performance, etc. These are generally misleading because there is no research directly proving that cleaning a Mac system can help speed it up, though HDD-based Macs could gain a bit performance increase from defragmentation. If your Mac has a built-in SSD, you don’t need to defrag. Also, in the Mac community, there’s a general consensus that you should keep at least 10% (some say 20%) free disk space in order for your machine to run smoothly.

3. You can’t clean macOS manually, you have to use an app.

This is a false statement that some advertisers take advantage of to help sell their paid products. The truth is, there are many ways to clean your Mac manually without using any utilities or apps. For example, all web browsers (e.g. Safari, Chrome, Firefox, etc.) allow you to clear the cache, browsing history, and unused extensions. Apple’s macOS also makes it easy to disable startup apps in Login Items (via System Preferences > Users & Groups), and you can uninstall most applications with a simple drag-and-dropEmpty Trash. You see, all these tasks can be done manually without using any third-party apps.

Who Should (& Should NOT) Get a Mac Cleaner App

The main value proposition of a Mac cleaning app is that it should reclaim storage space while spending little time achieving it in the process. Therefore, you should consider using a cleaning app in the following situations:

• If your Mac is running out of disk space, especially if you get that “Your disk is almost full” warning.
• You are relatively new to macOS and uncomfortable handling technical stuff, though you can definitely learn how to deal with the matter on your own.
• You know how to clean your Mac manually, but it’s not worth your time.

You probably won’t benefit from a Mac cleaner app if you own an old Mac and it is running super slow, keeps freezing, or has general performance issues. You’d be better off simply upgrading your computer.

Case in point: I’m on a mid-2012 MacBook Pro. Last year, I managed to replace the internal HDD (a Hitachi hard disk drive) with a new solid-state drive from Crucial, and the performance boost was absolutely crazy. Initially, my machine took at least 30 seconds to fully start up. Now, it only requires ten seconds or so. Plus, it’s much quieter thanks to the advantages SSDs have over HDDs.

Also, if you’re a photographer or videographer who regularly uses an old Mac (prior to 2012) for heavy photo/video editing, you may consider adding extra RAM as this will help increase your Mac’s capability to process requests and avoid app frozen issues. There are many other possible reasons why a Mac may run slowly. Check out this infographic for more details.

How We Picked and Tested

It’s hard to compare different products with the same criteria. These days, app developers understand how to compete by differentiating their products over aspects like features, pricing, and support. We thus disclaim here that the goal of conducting this review and comparison is to help our readers make wiser decisions and find their desired Mac cleaner apps. By no means do we aim to rank these products.

Also, we’ve hand-tested and used each of the programs. With some of them, we also reached out to the developers’ support team for product-related questions. In doing this, we strive to fully understand what an app has to offer and evaluate the support quality of its developer. Below are the key points we looked at when evaluating these apps:

1. The app’s core functions must include cleaning.

Your goal is to make room for your Mac, not to install a number of third-party utilities that eat up more storage. Ideally, the best cleaner app is cleaning-focused, meaning it should aim to help users remove unneeded files and applications. We understand that in reality, it’s hard to find apps that offer exactly the same features without differentiation. Therefore, we expand ed the level of consideration a little bit. As long as one of the app’s core features is cleaning, we put it to the test.

2. How effectively does the app clean your Mac?

When it comes to reviewing a piece of software at SoftwareHow, the primary factor we always evaluate is effectiveness. This is important because apps should do what they claim to offer: Reclaim a decent amount of disk space by cleaning system junk, identifying and deleting useless items like old iOS backups, finding duplicated or similar photos, uninstalling third-party apps and their remnants, etc.

3. Is the app easy to use?

Software is designed for humans, and we expect a well-developed cleaning app to be simple to use. It doesn’t have to be equipped with a fancy or sleek user interface (if it does, that’s definitely better), but the features, navigation buttons, and text instructions must be clear and easily understood. Also, app crashes or file corruption may be unacceptable depending on how badly it hurts the user experience.

4. How much does the app cost?

Free apps are great and if they do the job they’re even better. But it’s worth noting that a free app isn’t necessarily the best app. We conducted these reviews from the perspective of what these apps offer — in other words, the benefits they provide, i.e, how much storage space they free up on your computer hard drive. In general, paid apps tend to offer more than free apps. Among those paid apps, pricing also varies. For example, CleanMyMac is priced at $39.95 per Mac (one-time fee), while iMobie MacClean costs $29.95 per Mac but it comes with a $19.95 annual subscription model as well. When it comes to evaluating whether a Mac cleaning app is worth it, we often take both its features and price into consideration.

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5. How good is the developer’s customer service?

When you have questions or encounter any technical issues related to an app, it’s best that the developer can be reached out in a number of ways like email, live chat, or phone. If they have a knowledge base with FAQs and/or an actively moderated forum, that’s even better. In our opinion, paid cleaning apps usually offer higher-quality, more timely customer support than free apps. This is unfortunate but reasonable, as adding a new channel for support means extra cost to the developer.

6. Is the app compatible with the latest macOS version?

Apple launches a new major macOS version every year. As of this writing, the newest is 10.13 High Sierra. Most Mac users will choose to update their machines to the latest version. For example, I just updated my MacBook Pro to High Sierra (you can read this post for a list of performance issues and fixes I discovered) and found a few apps I regularly use were out of date. One of those was CleanMyMac. I was using an older version, 3.6, which is only usable on Sierra. Luckily, once I updated the app to the latest version, 3.9, it worked perfectly. Therefore, the best Mac cleaner app must support the latest macOS. It’s ideal if it also covers some older macOS versions.

The Winners

Best Choice: CleanMyMac + Gemini

CleanMyMac 3 has a number of cleaning utilities that are helpful in getting rid of system junk, while Gemini 2 shows its power in detecting and removing duplicate photos and files.

Both apps are developed by the same company, MacPaw Inc., and they are extremely easy to use. To be frank, I really wished that MacPaw integrated Gemini’s features into CleanMyMac. I emailed their team my feedback, but it seems they don’t have a plan to do this at the moment.

That’s why I recommend this cleaning bundle — you can get CleanMyMac and Gemini for only $53.95 (with a 10% discount). Of course, you can choose to get them separately. I suggest you try out the trial version, which is free, before committing to the app or the bundle.

I’ve thoroughly tested almost every feature of both these apps. You can read my detailed review of CleanMyMac and the full review of Gemini here. For the sake of time, I’ll highlight a few key features I like and explain what they mean to you. I’ll also point out the things I dislike so you can better understand whether or not it’s right for you.

Here’s the main screen of CleanMyMac v. 3.9 on my MacBook Pro, 10.13 High Sierra based.

CleanMyMac 3 all comes down to convenience, and the feature I like most is Smart Cleanup, which you can see in the screenshot above. It took less than a minute for the app to scan my Mac (which has a 500GB solid state drive), and it found 5.79GB junk that was safe to remove. Please note that I run the app regularly and the last scan was just two weeks ago. If it’s your first time using this app, you’ll probably find a lot more junk.

The second feature I really appreciate is Large & Old Files. A quick scan found close to 112 GB of files. CleanMyMac automatically puts them into different groups, sorting them by size from top to bottom. I found this helpful because I don’t have to take the time to manually check up on every folder.

Pay attention, though! A file that’s old and large doesn’t mean it should be deleted. I highly encourage you to carefully review each item (by clicking the “Reveal in Finder” and “Quick Look” icons within the app) before removing them. For example, on my MacBook, CleanMyMac found a large disk copy of my Lexar flash drive stored in the Downloads folder. The file is 32 GB in size, which caught my attention immediately.

After reviewing, the file turned out to be redundant as I’ve backed up my Lexar data to an external hard drive. So, I knew it was okay to delete. Once I selected this item and hit the “Remove” button, CleanMyMac displayed, “32.01 GB removed. You now have 257.69 GB free on your startup disk.” Boom…how cool is that?

Under the “Utilities” section, you’ll see several tools like Uninstaller, Maintenance, Privacy, Extensions, and Shredder. Those features are pretty self-explanatory and can be useful for many of you. However, don’t use them that often because most of those tasks can be completed in other ways I’m already familiar with. For example, you can disable startup apps and services via Extensions > Login Items.

There are several other things about CleanMyMac that I’m not a fan of. For example, the app menu adds itself to the auto startup list once installed (though you can disable it in the preferences), and sometimes a scan causes my Mac to heat up quickly.

Overall, those issues are tolerable compared to the incredible amount of value CleanMyMac provides. As you can see, I managed to reclaim close to 38 GB in storage, and the whole process took less than ten minutes to complete. In this regard, CleanMyMac 3 is a huge time-saver, and keeping it on my Mac is a no-brainer.

Next, we’ve got MacPaw Gemini 2, the intelligent duplicate finder app.

Here’s the main screen of Gemini v. 2.4.2 on my MacBook Pro, based on 10.13 High Sierra.

These days your Mac is probably the hub for everything. It’s the place to save your backup files (or backup of your backups, like they say) and photos you shot on your iPhone or digital camera, etc. The tricky part is that those items can take up lots of disk space and can result in a lot of duplicates. This can especially be the case if you’ve used your Mac for a long time.

Manually checking and comparing those files to identify duplicates is unrealistic. Luckily, there are amazing apps like Gemini 2 that can help you quickly find and delete duplicate files. The best part? It’s extremely easy to use. The latest version, 2.4.3, is also fully compatible with macOS High Sierra.

For example, I selected a random folder on my Mac and let Gemini scan it. In about 30 seconds, it found 654 MB similar files and some exact duplicates. A quick review revealed that they are mostly photos recently uploaded to my Mac, and I hadn’t yet organized them. The number may not look exciting — but considering this is a random test, I was quite happy with the results I got.

Previously, I tested an earlier version of the app and wrote a review based on my findings. That was a little over half a year ago. It found nearly 40 GB duplicate files on my MacBook, and I ended up removing 10 GB within just a few minutes. Gemini 2 is available to buy on Mac App Store at $19.99 USD, but I recommend you get it from the official MacPaw website because there’s a free trial that you can test drive before paying. The price on their site is the same as on App Store.

The support for both CleanMyMac and Gemini are also amazing. MacPaw, the developer of these apps, offers a number of ways to take customer queries including email, phone calls, and social media channels. They’re most active on Twitter.

Also Great: Drive Genius

If you’re willing to pay a bit more for a Mac cleaner in order to get some enhanced security and optimization, Drive Genius 5 from Prosoft Engineering is the tool to beat.

The app includes every feature a cleaner app has to offer, plus additional protection against viruses and malware which helps protect your investment from any threat.

The best part? Drive Genius is also used and recommended by the tech geeks at Apple Genius Bar.

Do Macs also get viruses? The answer is yes, even if Apple says otherwise (watch this old Apple commercial ad). You can read about several examples of Mac malware compiled in Macworld. The article also mentions that there’s been a 230% increase in malware in 2017, and that scam software is coming to Mac App Store — once a small issue, especially when compared to PCs.

Just a couple weeks ago, I chose to update my MacBook Pro to the latest 10.13 High Sierra, only to find that a huge vulnerability was reported all over the world: Hackers could extract text passwords from Keychain. You can read more details in this 9to5mac post. Although Apple quickly responded to this issue and launched a supplemental update for High Sierra, their once bulletproof reputation has yet to recover.

Drive Genius was originally developed to keep your Mac hard drive clean and safe from disk errors. The newest edition, 5, has added a comprehensive feature called Malware Scan, part of the automated DrivePulse utility which monitors your Mac for potential issues and viruses. On its main screen, you can get an idea of what the app offers. You can also read our full review of Drive Genius here.

To clean and speed up your Mac, Drive Genius provides several tools. The first one I’d like to highlight is “Find Duplicates”. It’s pretty much like Gemini 2, which allows you to locate duplicate files and remove them to free up disk space. The “Find Large Files” utility is similar to CleanMyMac‘s “Large & Old Files” feature, which is self-explanatory. Another feature I want to mention is “Defragment”, which makes files stored on your Mac hard drive (HDD only) more organized through defragging. It can give a helpful speed boost, as my teammate Adrian Try pointed out in his reviews.

The customer support team from Prosoft Engineering offers phone and email support (Monday to Friday, 7 AM to 5 PM, PST). They also have lots of useful documentation to help users learn how to properly handle Drive Genius and tackle macOS related problems. The latest version of Drive Genius is fully compatible macOS 10.10 Yosemite, 10.11 El Capitan, and 10.12 Sierra. 10.13 High Sierra support is coming soon.

Honorable Mention: Dr. Cleaner

Dr. Cleaner is a product developed by Trend Micro, an enterprise cybersecurity solution provider most famous for its anti-malware and application control software. The app caught my attention while I was testing Dr. Cleaner (the free version) and found that the app offers a lot more free features than most of its competition, and I instantly felt the app developer’s ambition. This is a good thing for Mac users because we have another good “free” cleanup tool, though Dr. Cleaner’s cleaning capabilities still have room for improvements while compared to that of CleanMyMac (you can real my full review for details).

Dr. Cleaner has a free version that allows you to clean your disk (e.g. removing cache and temp files, user download folders, web browser junk, etc.), optimize memory usage by closing apps, and monitor usage of the CPU and network. The professional version, called Dr. Cleaner Pro, is offered at a $14.99 price point. The Pro version allows you to access several advanced features including Smart Scan, Duplicate Finder, App Manager, and File Shredder.

There’s also the Dr. Cleaner Menu (see above), a mini app that shows up on Mac menu bar once you install Dr. Cleaner. At first glance, it’s like the Apple’s Activity Monitor app built into macOS. But I find the Dr. Cleaner Menu much convenient and easier to use because I don’t have to launch Activity Monitor via Spotlight search every time I want to know what’s going on with my Mac’s real-time status.

Dr. Cleaner is free to get from the Mac App Store. The app requires OS X 10.10+ and 28.9 MB space to run and fully supports latest macOS High Sierra. I didn’t encounter any issues during my tests. Trend Micro offers customer support for the app. You can read more from my Dr. Cleaner review here.

The Competition and Comparison

iMobie MacClean wants to be the all-in-one cleaning suite for Macs. At first glance, it’s a combination of CleanMyMac and Gemini, but even more powerful because the app claims it can clean malicious cookies and scan your Mac’s Applications and Downloads folders for potential security risks. The app looks attractive and is simple to use, as you can see from its main navigation panel on the left part of the main interface.

Like other cleaning apps, MacClean has a number of tools for the job as you can see from this screenshot. Version 3.2.0 built on 20170920.

My teammate Adrian reviewed MacClean thoroughly and found that it was able to free up around 35 GB storage from his MacBook Air with a 128 GB SSD drive. Most scans were quite fast, usually completed in seconds — very helpful, as Adrian said. However, the app definitely has room for improvement, as Adrian encountered several crashes, and failed to find some large files he hadn’t used for a while. That said, MacClean is well worth it considering as it costs only $29.99 for personal license and $39.99 for a family license (which allows you to install the software on up to five Macs and earns you priority support). We gave it a 4-star rating in both Effectiveness and Support (they were responsive via email tickets). The latest version, 3.2.0, supports macOS High Sierra.

A scanning result of DaisyDisk 4.4 on my MacBook Pro, High Sierra based.

DaisyDisk is a beautiful yet different disk space analyzer that allows you to quickly find what’s taking up the most storage on your Mac. A quick scan showed me that 215 GB had been used. The funnest part is that DaisyDisk shows those files in a sunburst diagram. If you hover your cursor over each block, it will blink and further file details in that “block” will show up. You can then move the unneeded files to the collector (located on the bottom left corner), or directly drag and drop them there. Unfortunately, deleting files or applications from the collector is restricted in the free trial (as you can see from this popup warning). You’ll need to buy a license, which costs $9.99, either from the official website or Mac App Store. The DaisyDisk app was reviewed and covered by 9to5mac, MacRumors, and a few other prestigious magazines. I especially liked and appreciated the design of the app, which gives me a different and cool feeling. It’s also inexpensive. Just save two cups of coffee per month and you get this beautiful app — totally worth it.

However, I’d like to point out that Apple has a built-in function that allows you to do pretty much the same thing. Click on the Apple logo on the top left, then About This Mac > Storage > Manage, here you’ll get a detailed overview of your system storage information. For example, when I select Documents, macOS automatically sorts them based on size (from big to small). I can then remove those old large files to free up some space. If that’s all that you want to do, you probably don’t need to buy DaisyDisk. Again, it’s a paid app ($9.99) and the developer offers email support for it. It requires OS X 10.10+ to run and is compatible with 10.13 High Sierra.

Main interface of IObit MacBooster, version 5.0.5.

MacBooster is neck-and-neck with CleanMyMac in terms of features, though MacBooster has added several features that CleanMyMac doesn’t offer including Defragment, Duplicates Finder, and Photo Sweeper. All of those features are categorized into four main modules as you can see from the main interface above: System Risks, Cleaner, Booster, and Tools. The program looks attractive, with three main dashboards clearly laid out in the center, resembling a car dashboard.

Under “System Status”, a quick scan will show you all the “issues” on your Mac. Note that I use a quote here because I feel IObit, the maker of MacBooster, is a bit over-serious in making users believe those “issues” are problems that deserve attention. For example, after using the app to scan my Mac, it found close to ten thousand issues and my system was marked as “Dangerous”. A closer examination revealed that most of those issues were privacy data e.g. cookies, browsing histories, etc. left behind in the Chrome browser. I regard those as a false report. However, I do like the Duplicates Finder and Photo Sweeper features, which are quite similar to what Gemini 2 offers. Photo Sweeper is most useful for those who are used to syncing photos across your mobile devices without cleaning them; you can use this feature to locate those duplicates or similar files and remove them safely. This should help you free up a decent amount of storage considering these days digital assets are larger in size.

Similar to the CleanMyMac Menu which shows up as a shortcut in the menu bar, MacBooster Mini also allows you to get a quick overview of your Mac, e.g. how much memory has been used, your real-time network download or upload speed, and how many GBs are available to use for storage. In general, MacBooster is a nice app that aims to clean and speed up a Mac machine. Its features are a combination of what CleanMyMac and Gemini offer, and even go beyond. However, choosing the best Mac cleaner software is not simply a game of comparing the number of features. Personally, I still prefer the user experience of CleanMyMac and Gemini, and recommend them because they are more lightweight in nature, as well as the way MacPaw markets their products.

MacBooster is priced at $39.95 for Lite (1Mac), $59.95 for Standard (3 Macs), and $89.95 for Premium (5 Macs). The app runs on Mac computers with OS X 10.7 or later (High Sierra included). IObit offers support via email, and they have an active forum specifically dedicated to monitoring customer feedback.

The Cleanup interface of MacFly Pro, version 1.0.48.

MacFly Pro is a new player in the Mac cleaning app market. Initially, it appeared on ProductHunt about three months ago, branding itself as “a simple-yet-powerful tool to keep your Mac’s drive sparkling clean and junk-free…with a clean and intuitive interface, without irritating pop-ups or needless permission requests”, as its maker, Tomasz Jesko, posted in the discussion. I installed and ran the app on my High Sierra-based Mac without any problem. After a quick system scan, I was surprised to see that the app discovered 2.69 GB junk files on my Mac, while CleanMyMac could only locate 1.39 GB.

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However, after carefully reviewing the results, I finally discovered MacFly counts the content in /private/var/folders as junk while CleanMyMac doesn’t. Out of the 2.69 GB of junk it found, 1.45 GB was from this folder. You probably shouldn’t delete files in this folder unless you know what you’re doing, as you could break something or cause a problem with macOS. Currently, MacFly Pro offers a free 7-day trial; after that, it requires a $4.99/mo subscription. At this moment, I wouldn’t recommend this app, considering that it’s still in the preliminary stages and needs more work to make it compete against CleanMyMac. Plus, the cost will add up quickly if you commit to its subscription-based pricing. It’s definitely worth watching, however.

What about Those Free Apps

CCleaner Free – CCleaner has racked up millions of downloads from PC users, and Piriform definitely wanted to replicate its success on Mac. I’ve used the app on both my HP laptop and MacBook Pro. The interface and feature set on both the Windows and macOS versions are almost the same, except that the Windows version has a registry cleaner feature. macOS doesn’t have a registry (learn more about the reason from this Quora discussion), so no registry cleaner is needed.

You can use CCleaner to quickly remove your web browser cache files, history, cookies, etc. It also offers a few utilities (mainly under “Tools” section) that allow you to uninstall third-party apps, disable or remove startup items, and erase a whole disk volume (do so with extreme caution!). The app is really good, but frankly, I still prefer CleanMyMac because it’s way more powerful than CCleaner and much easier to use. If you have tried both apps, you’ll probably agree that CCleaner Free is far behind in cleaning features, and the results (i.e. extra disk space) you get will be night and day. Another reason that might hold you back from considering CCleaner is the recent malware issue involved with the app. You can read more about that in this TechCrunch report; I covered the issue here as well.

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OnyX version 3.3.8, the interface of the Maintenance module).

OnyX – OnyX is a freeware app that gets lots of love in the Apple community. Personally, I feel it’s best for power users and techies. Unlike cleaning software primarily designed for non-tech users, you’ll probably have a hard time using OnyX. Its user interface looks quite different from the other apps reviewed here, with lots of checkboxes and buttons to click. It’s powerful, can do the job for you, and offers a number of other utilities; however, I find it’s not best for me.

Just a side note: It definitely caught my nerve when my MacBook froze up for about ten seconds while the app verified my startup disk. During that time, I couldn’t even move the cursor until a pop-up window said, “The disk has been verified, the startup disk appears to be OK.” Though OnyX had an important disclaimer about this freeze, users who don’t carefully read the disclaimer might think the issue was permanent and give their Mac a hard reboot. OnyX supports all versions of OS X and macOS, including latest 10.13 High Sierra.

AppCleaner version 3.4, compatible with macOS High Sierra

AppCleaner – Like its name indicates, AppCleaner is a utility specially designed to help users clean unwanted apps and related files associated with those apps. It’s quite similar to the “Uninstaller” feature in CleanMyMac; however, CleanMyMac shows you a complete list of apps installed on your Mac, while AppCleaner doesn’t.

Pro tip: AppCleaner supports batch operations, meaning you can drag multiple unwanted apps and drop them into the main zone. I found this very efficient (see the screenshot above): You first open AppCleaner and drag the app to the left part of your screen. Then, just open Applications and select those third-party apps you want to remove, and drag them into AppCleaner. The apps and their associated files will be removed immediately. I really like this small utility; it’s simple and well-designed. If you are an “app junkie” who has installed scores (if not hundreds) of third-party apps on your Mac, AppCleaner is definitely a go-to tool — and it’s free.

A loading result in Disk Inventory X, version 1.0.

Disk Inventory X – This app, developed by Tjark Derlien, claims it can scan a disk and show the sizes of all files and folders in visualized “treemaps”. In this sense, it’s similar to DaisyDisk — both apps give you a colorful overview of your Mac files. I almost gave up on Disk Inventory X because it took about five minutes to fully load the content on my startup disk with 180.3 GB used (as you see from this screenshot). During this process, it seemed like the app would stay in the loading process forever. I even had a hunch that the app isn’t fully optimized for scanning an APFS-based drive.

Luckily, the magical results showed up (patience is a virtue :-)) and I was able to navigate through the treemap to see what kind of files are taking up disk space. You can click “Reveal in Finder” for further review, or click “Move to Trash” to remove the content. In my opinion, Disk Inventory X offers some value, but I still prefer the “Manage Storage” overview as a default in macOS.

Monolingual – This is an app for deleting unnecessary language files built into Apple macOS by default. By utilizing this app, you can free up several hundred megabytes, or a little over 1 gigabyte in space. Simply open the app, select those languages you don’t want to keep and click the “Remove” button. Note: Monolingual auto-selects all other languages (except the ones you regularly use like English). It’s worth double checking just to ensure you only remove those unwanted language packs. I choose to keep those languages on my MacBook Pro, mainly because it currently has about 50% free storage space, and some language files may be useful for an international friend just in case he/she borrows my Mac. Monolingual requires a 64-bit Intel-based Mac with macOS 10.12 Sierra or 10.13 High Sierra.

The main interface of dupeGuru for macOS, version 4.0.3.

dupeGuru – dupeGuru is an app that finds duplicate files on your Mac; in that vein, it’s similar to Gemini 2. As you see on the main screen below, it has three modes (Standard, Music, and Picture) for you to choose from depending on what kind of files you want to scan. You can also define a specific “Scan Type” under each mode. For example, for Standard, you can scan by contents or by file names, whereas Music allows you to scan by tags as well. I used it to check my Downloads and Desktop folders for duplicates. The scan process was very quick. The results were clearly displayed like a table, and from there I was able to easily identify which ones are copies, as they are marked in blue. The app also shows you file size, which folders those files are stored in, and a match percentage (in my case, mostly 100%).

It’s a great app, does what it does well, and is free. I don’t believe dupeGuru is less powerful than Gemini 2. But in terms of user experience, Gemini 2 is definitely superior: It looks more attractive and has “Smart Selection” and “Smart Cleanup” buttons which allow you to select all duplicates and remove them in just one click. Though the developer, Hardcoded Software, notes on its official website that the app is for OS X 10.8 to macOS 10.12, I ran dupeGuru on my Mac with 10.13 High Sierra without any problems.

Fair Disclosure: Some of the links on this page are affiliate links, meaning that if you click on one of them and decide to buy the app, I may get a commission (at no additional cost to you). If you do not feel comfortable with this, you can do a quick Google search, enter the app developer’s official website, and get to it that way. I’d appreciate it if you would support my work and buy from my affiliate links. By doing so, you’re helping me create more thorough, unbiased software reviews on SoftwareHow (without putting any flash ads on the site). Again, please note the price you pay will be no different, and you won’t be charged any extra cost. Thanks!

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Update History:

• dupeGuru is no longer maintained by Hardcoded Software and thus changed its homepage.
• Drive Genius 5 decreased the price from $99 to $79.