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Optimized Storage in macOS Sierra and later* can save space by storing your content in iCloud and making it available on demand. When storage space is needed, files, photos, movies, email attachments, and other files that you seldom use are stored in iCloud automatically. Each file stays right where you last saved it, and downloads when you open it. Files that you’ve used recently remain on your Mac, along with optimized versions of your photos.
* If you haven't yet upgraded to macOS Sierra or later, learn about other ways to free up storage space.
Find out how much storage is available on your Mac
Choose Apple menu > About This Mac, then click Storage. Each segment of the bar is an estimate of the storage space used by a category of files. Move your pointer over each segment for more detail.
Click the Manage button to open the Storage Management window, pictured below. This button is available only in macOS Sierra or later.
Manage storage on your Mac
The Storage Management window offers recommendations for optimizing your storage. If some recommendations are already turned on, you will see fewer recommendations.
Store in iCloud
Click the Store in iCloud button, then choose from these options:
Desktop and Documents. Store all files from these two locations in iCloud Drive. When storage space is needed, only the files you recently opened are kept on your Mac, so that you can easily work offline. Files stored only in iCloud show a download icon , which you can double-click to download the original file. Learn more about this feature.
Photos. Store all original, full-resolution photos and videos in iCloud Photos. When storage space is needed, only space-saving (optimized) versions of photos are kept on your Mac. To download the original photo or video, just open it.
Messages. Store all messages and attachments in iCloud. When storage space is needed, only the messages and attachments you recently opened are kept on your Mac. Learn more about Messages in iCloud.
Storing files in iCloud uses the storage space in your iCloud storage plan. If you reach or exceed your iCloud storage limit, you can either buy more iCloud storage or make more iCloud storage available. iCloud storage starts at 50GB for $0.99 (USD) a month, and you can purchase additional storage directly from your Apple device. Learn more about prices in your region.
Optimize Storage
Click the Optimize button, then choose from these options.
Automatically remove watched movies and TV shows. When storage space is needed, movies or TV shows that you purchased from the iTunes Store and already watched are removed from your Mac. Click the download icon next to a movie or TV show to download it again.
Download only recent attachments. Mail automatically downloads only the attachments that you recently received. You can manually download any attachments at any time by opening the email or attachment, or saving the attachment to your Mac.
Don't automatically download attachments. Mail downloads an attachment only when you open the email or attachment, or save the attachment to your Mac.
Optimizing storage for movies, TV shows, and email attachments doesn't require iCloud storage space.
Empty Trash Automatically
Empty Trash Automatically permanently deletes files that have been in the Trash for more than 30 days.
Reduce Clutter
Reduce Clutter helps you to identify large files and files you might no longer need. Click the Review Files button, then choose any of the file categories in the sidebar, such as Applications, Documents, Music Creation, or Trash.
You can delete the files in some categories directly from this window. Other categories show the total storage space used by the files in each app. You can then open the app and decide whether to delete files from within it.
Learn how to redownload apps, music, movies, TV shows, and books.
Where to find the settings for each feature
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The button for each recommendation in the Storage Management window affects one or more settings in other apps. You can also control those settings directly within each app.
If you're using macOS Catalina, choose Apple menu > System Preferences, click Apple ID, then select iCloud in the sidebar: Store in iCloud turns on the Optimize Mac Storage setting on the right. Then click Options next to iCloud Drive: Store in iCloud turns on the Desktop & Documents Folders setting. To turn off iCloud Drive entirely, deselect iCloud Drive. In macOS Mojave or earlier, choose Apple menu > System Preferences, click iCloud, then click Options next to iCloud Drive. Store in iCloud turns on the Desktop & Documents Folders and Optimize Mac Storage settings.
In Photos, choose Photos > Preferences, then click iCloud. Store in iCloud selects iCloud Photos and Optimize Mac Storage.
In Messages, choose Messages > Preferences, then click iMessage. Store in iCloud selects Enable Messages in iCloud.
If you're using macOS Catalina, open the Apple TV app, choose TV > Preferences from the menu bar, then click Files. Optimize Storage selects “Automatically delete watched movies and TV shows.” In macOS Mojave or earlier, open iTunes, choose iTunes > Preferences from the menu bar, then click Advanced. Optimize Storage selects “Automatically delete watched movies and TV shows.”
In Mail, choose Mail > Preferences from the menu bar, then click Accounts. In the Account Information section on the right, Optimize Storage sets the Download Attachments menu to either Recent or None.
Empty Trash Automatically: From the Finder, choose Finder > Preferences, then click Advanced. Empty Trash Automatically selects “Remove items from the Trash after 30 days.”
Other ways that macOS helps automatically save space
With macOS Sierra or later, your Mac automatically takes these additional steps to save storage space:
Detects duplicate downloads in Safari, keeping only the most recent version of the download
Reminds you to delete used app installers
Removes old fonts, languages, and dictionaries that aren't being used
Clears caches, logs, and other unnecessary data when storage space is needed
How to free up storage space manually
Even without using the Optimized Storage features of Sierra or later, you can take other steps to make more storage space available:
Music, movies, and other media can use a lot of storage space. Learn how to delete music, movies, and TV shows from your device.
Delete other files that you no longer need by moving them to the Trash, then emptying the Trash. The Downloads folder is good place to look for files that you might no longer need.
Move files to an external storage device.
Compress files.
Delete unneeded email: In the Mail app, choose Mailbox > Erase Junk Mail. If you no longer need the email in your Trash mailbox, choose Mailbox > Erase Deleted Items.
Learn more
The Storage pane of About This Mac is the best way to determine the amount of storage space available on your Mac. Disk Utility and other apps might show storage categories such as Not Mounted, VM, Recovery, Other Volumes, Free, or Purgeable. Don't rely on these categories to understand how to free up storage space or how much storage space is available for your data.
When you duplicate a file on an APFS-formatted volume, that file doesn't use additional storage space on the volume. Deleting a duplicate file frees up only the space required by any data you might have added to the duplicate. If you no longer need any copies of the file, you can recover all of the storage space by deleting both the duplicate and the original file.
If you're using a pro app and Optimize Mac Storage, learn how to make sure that your projects are always on your Mac and able to access their files.
Keeping a close eye on your Mac’s disk drive is always a good ideea since duplicate files or images can pile up on you in no time slowing down your device and wasting a lot of that precious disk space.
If you own a Mac and you want to keep things clean on your device or you want to free up some storage space, we propose you take a look at these 12 Mac cleaner apps.
1.Duplicate File Doctor
If you have issues with duplicate files that fill up your storage space you can download Duplicate File Doctor and you will get rid of them very easily. You can select the folders that you want to scan for duplicate files and after the app has identified the junk files you can move them to the trash or delete them permanently. All this and much more for just $4.99.
2. Image Cleaner
If you are a professional photographer or just passionate about photography you definitely need an app that can remove all the duplicate images that get piled up on your system over time. Image Cleaner in an app that comes with an advanced detection algorithm, a very friendly interface for selecting the duplicate images and many other features. You can get this app for $4.99.
3. Smart Mac Care
Smart Mac Care is considered one of the best cleaning apps for Mac. It comes with advanced features and a lot of abilities that make your device work much better. This app keeps your Mac safe from malware, trojans, adware and it detects and removes all the unwanted junk files from you device. You can get this app for $59.99.
4. CleanMyMac X
This Mac cleaner software is a later version of the CleanMyMac 3 app, which is developed by MacPaw. Once you download it, this app will scan your disk and it will show you all the issues of your device. After that, you can delete all the unwanted files. You can get it for $39.99.
5. CCleaner
CCleaner is an amazing app that will protect the privacy of your Mac and will help you remove the unwanted junk files from your disk drive. The app has a FREE version and a Professional version. The professional version can be bought for $24.99.
6. Disk Clean Pro
If you are looking for an app that can do a complete disk clean-up on your device without putting your important data at risk, you have to download Disk Clean Pro. Also, this app will boost your system speed and will prevent any slowdowns. You can download it for FREE.
7. MacBooster 7
MacBooster 7 is a great app that protects your Mac from over 20 types of junk files. This app will free up your system’s hard disk and give you more storage space making your Mac run faster. This app is perfect for cleaning, optimizing and securing your Mac. You can get it for $4.99/month.
8. DaisyDisk
DaisyDisk is a disk cleaner software developed by Software Ambience Corp. This app asks you to select a disk and it then scans it. After that, you are allowed to remove the unwanted files that are occupying your space. You can download this app for $10.99.
9. Disk Inventory X
This is also a disk cleaning app for Mac. It scans the disk and shows you its usage via a treemap format that makes use of different colours. Users can click on each section and delete the files. You can get this app for FREE.
10. Disk Doctor
We present to you yet another disk cleaner for Mac that scans your disk and separately shows its usage in numbers. Also, this app lets you recover your storage space very easily. You can buy it for only $2.99.
11. Data Rescue
Best Malware Cleaner For Mac Os
Data Rescue is a very easy to use sofware with a very clear and smart interface that allows you to recover deleted files. It also allows you to scan your external drives and optimize them. It is a great app developed by Prosoft Engineering and you can download it for $99.
Best Mac System Cleaner
12. OnyX
Best Cleaner For Mac
This is a software that can analyze and optimize your Mac’s disk drive. OnyX has a basic interface but it is a very useful app which gets the job done. You can download it for FREE on the Mac App Store.