ThinkMobiles is one of most trusted companies conducting IT & software reviews since 2011. Our mission is to provide best reviews, analysis, user feedback and vendor profiles. Learn more about review process.

Apps and tips to free up space on Mac

Dmitry Yedin

Dmitry Yedin is an analyst and author, a part of the “multimedia” crew of ThinkMobiles. Don’t even start with him on games, graphics, video content or messengers.


We may receive compensation when you click on links. Neither our writers nor our editors get paid to publish content and are fully committed to editorial standards .

PC optimization (cleaner, repair) apps are a particular group of software that can either help by cleaning junk files, or make things even worse, like installing scam apps. And it is not so easy to find a solid tool considering that most trial versions are stripped of functionality. To assist readers seeking how to free up space on Mac we will review relevant methods and apps to get extra space, clean cache, remove duplicate files, etc. For some, macOS capabilities will do the job, for more options we’ll test out several optimizer apps.

macOS native optimization tools

These methods and tools are as simple and secure as it gets, so anyone can do it without special skills. Find and clean up your device from big-size files, or files that are not in use for a long time, and you’ll see the difference.

  • To free extra space

To open a tool we need, click the Apple logo in Menubar or Topbar > About This Mac > Storage tab > Manage.

how to get extra space on macos

Here we can see a few options macOS friendly recommends us:

  1. iCloud – Apple’s cloud storage ($1 – 50 GB, $10 – 2 TB).
  2. Optimize Storage – mostly for iTunes and Mail apps, it deletes movies that have been watched and wipes out irrelevant mail attachments.
  3. Empty Trash Automatically – deletes all from the Trash bin every 30 days.
  4. Reduce Clutter – offers a list of large files to remove.

mac storage optimization tool

We were definitely stunned to see 2,015 files we had no idea about. And by deleting most part of it we freed 7 GB of disk space. Also, as you see, there is a menu on the left side showing file types and Mac storage situation, thus serving as a nice hint to find extra free space.

  • To manage iTunes, iOS backups

If you own several iOS devices, you are synchronizing all via iTunes. There are two ways iTunes is saving backups: a) To This Mac, or b) To iCloud; and if you’ve never changed this option, it is saving To This Mac by default. 

To find all iOS backups on a Mac open iTunes > Preferences (or press CMD⌘ + , ) > Devices tabWhy are we mentioning this? Sometimes it happens that two copies of the same device are saved, therefore you can easily delete one and free up to 5-15 GB. 

To manage iTunes media, you need to know the directory: open iTunes > click iTunes on Topbar > Preferences (or press CMD⌘ + , ) > Advanced tab > iTunes media folder location. In this folder, you will find music, podcasts, movies, and delete what you don’t need anymore. So, these are 2 main ways to free up space on Mac. Typically, it could result in 10-20 GB.

save space on iTunes media

Trusted optimizer apps 

We’ve selected applications carefully to make sure it is not a scam or potential malware. Yet, we also encourage users to double-check everything before installing third-party software on a Mac. We’ve set aside 4 apps with brief descriptions and a summary at the end. The summary contains features, performance (space freed), pricing and user ratings. 

#1 Avira Optimizer

Developer macOS Size Version License
Avira Holding GmbH 10.12 or later 52 Mb 1.1.0 Free 

At the moment, this app is free. It offers such optimization tools as Clean Junk, Cache Files and Browser Trash , Delete large/duplicate/old files, OnWatch (reminder), etc. There are two ways to scan the system: complete and large/old files only. 3.93 GB is the size of files Avira found in our case. 

avira optimizer

An informative mini-window displays current CPU, RAM, storage. Also, there is a Run at startup option, to activate it click the Settings button and check the respective box. Judging from the App Store and our own impression, the overall rating score is 4.5.


  • free optimization tool
  • trusted software vendor


  • currently in development, more features to come

#2 CleanMyMac X

Developer macOS Size Version License
MacPaw Inc. 10.10 or later 105 Mb 4.6.8 Free / Pro ($35.95)

CleanMyMac is a multifunctional app to optimize a device and to free up space on Mac. This app offers features to clean outdated cache, system junk, logs, large files, to scan for viruses and malware, to uninstall programs. After a full system scan, we found 4.78 GB of files, mail attachments, iTunes data and system junk.

CleanMyMac X to free up disk space

Trial version of CleanMyMac has limitations: only 500 Mb of files to clean and one app to  remove. Yet, the advantage of trial is full information about Mac storage. In terms of pricing, the app for one Mac per year costs $35.95, and there are other plans. User reviews are split, both positive and highly negative.


  • user-friendly interface
  • rich feature set in one app


  • 500 trial Mb limit

#3 Monolingual 

Developer macOS Size Version License
J. Schrier, I. Stein 10.13 or later 27.5 Mb 1.8.2 Freeware 

This is, actually, not an application but a small and free utility. The main and the only feature is to delete all language packages you don’t use on a Mac. It is a freeware, but anyone can support it by donating on this page. In our case, we saved almost 2 GB.

Monolingual utility for Mac

We’d like to draw attention to the fact that the algorithm automatically unchecks languages currently in use (see language panel in System Preferences > Language & Region). You also can manually uncheck any language. The app can remove both system packages and other programs’ languages, i.e. Microsoft Word, PowerPoint, Excel, iMovie, etc. 


  • free up to 2 GB in minutes
  • freeware, independent development


  • to restore language packages you need to reinstall macOS

#4 Gemini 2

Developer macOS Size Version License
MacPaw Inc. 10.10 or later 41 Mb 2.6.4 Free / Pro ($19.99)

Gemini is a duplicate finder with a few search modes: custom search, pictures, music, admin folder search. When scanning, Gemini automatically opens the iTunes and Photos app to  check for duplicate pictures and music. At the same time, the app consumes a large amount of system resources. Manual file selection to clean is surely an available option. Pro version costs $19.99 per year, whereas a fully functional trial lasts 3 days and you can’t delete any files through the program. 

Gemini 2 optimizer app


  • fully functional trial
  • pictures and music duplicates finder


  • negative user reviews
  • lengthy scanning


Product Tools Freed space* Pro / year User ratings
Avira Optimizer Clean junk, cache, delete large/duplicate/old files, alerts. 3.9 GB Free 4.5
CleanMyMac X Clean cache, system junk, logs, virus/malware scanner, uninstaller, display of hardware load. 4.8 GB $35.95 4
Monolingual Delete unused language packages. 2 GB Free 4.5
Gemini 2 Delete duplicate data, media, etc. 3 GB $19.95 3.5

* – Our own test results on a MacBook Pro that hasn’t been optimized for about two months. 

Read next: Uninstaller apps for macOS.

About author

Dmitry Yedin
Dmitry Yedin

Dmitry Yedin is an analyst and author, a part of the “multimedia” crew of ThinkMobiles. Don’t even start with him on games, graphics, video content or messengers.

Dmitry Yedin is a self-motivated and goal-oriented guy, a technology geek throughout his life, interested in computers, music, photography, and tech trends. Through diligence, analysis and care for detail he assists people in picking the best available options.