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.
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* If you haven't yet upgraded to macOS Sierra or later, learn about other ways to free up storage space.
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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.
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 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
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.
- 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.
In my opinion, only about 20 percent of an app’s features should be considered premium features that users should have to pay for. However, In most cases, users really only need the other 80 percent of features which should be free. But, to get those useful 80 percent of features, users have to dig into their pockets and pay for the 20 percent of features they don’t really need.
For CleanMyMac, a disk cleaner, which part is the 80 percent you should have gotten for free? Is there an app that provides that 80 percent?
Of course, there is. I’d like to recommend Trend Micro’s Cleaner One Pro, a free app that’s comparable with CleanMyMac.
Let’s see what functions CleanMyMac provides to its subscribers that Cleaner One Pro also provides, while pointing out features in CleanMyMac that might create problems or aren’t that necessary for the average user.
1. System Junk
“System” as defined by CleanMyMac includes user cache files, system log files, as well as the application language packs. The latest version of Cleaner One Pro supports the cleanup of user cache and system files, but stops at removing application language packs due to safety considerations: for certain software, there might be program errors once the language pack is removed. Moreover, a single language pack is very small and does not significantly affect the entire disk space.
2. Photo Junk
When iPhoto users synchronize their phone camera with the computer terminal, it creates residual cache files that speed up photo browsing for the user, but also increases the burden on disk by using up space.
We can say that this kind of space consumption is a double-edged sword, since browsing is speeded up. But for infrequent iPhoto users, this feature is somewhat superfluous. You get this feature as one of CleanMyMac’s value-added services, while Cleaner One Pro merges this function into the iTunes cache-cleaning function, because this function is too simple to separate out for display.
3. Mail Attachments
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When using the Mail app on the Mac, you can accumulate a lot of attachments over time. As you can see, these attachments are located in CleanMyMac, but did you know there is a risk when cleaning mail attachments? Once you have removed a mail attachment and are unable to sync to your mail server, you cannot get them back. In Cleaner One Pro, we designed mail caches into the Junk Files feature which does not affect your mail attachments.
4. Large Files
Large file scanning is a very useful feature. Users tend to ignore what they have downloaded, such as large software installation packages or movies. These large files can account for half of the disposable space of the disk. This function can indeed become a paid-for function, as it is with CleanMyMac, but in exchange for the support of its users, Cleaner One Pro provides this valuable function for free. With Cleaner One Pro you can also lock some files that you don’t want to remove in case you want to make sure you do not delete important files.
5. Disk Map
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We think it is user-friendly to help you manage all the files on your hard disk using a visual map, so we added the Disk Map feature into Cleaner One Pro for free. However, no functions like this can be found in CleanMyMac.
Disk Map quickly scans your drive and builds an amazing visualization of all the files and folders on your computer, allowing you to easily navigate the system and find the content that takes up the most space.
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In addition, all folders and files under the home folder are listed out by size. As for some system-required critical files, deleting them would provide a prompt that those are important and are not allowed to be removed. With the Disk Map feature you can also find out when a file or folder was created, modified or last opened. Furthermore, hovering your mouse on one folder then clicking the magnifier icon will direct you to the file location.
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Is Cleaner One Pro worth trying? Absolutely, yes! Don’t hesitate. It not only cleans up your disk space but also solves other Mac issues you might have. In addition, we are also the least expensive cleaning app on macOS. If you still cannot afford it, you can call your friends or family to share the cost. Thanks Apple for letting us share wonderful applications together via family sharing. Regardless if you are new to the Mac or an advanced user, Cleaner One Pro will be a good choice for you. While Cleaner One Pro can help you free up a lot of space, please don’t forget to back up your important files, in case an unfortunate event happens like your hard disk malfunctions. We regard customers’ data security as the most important thing. I hope you will have fun with Cleaner One Pro in the future!
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Thanks for taking the time to read my article. How do you like Cleaner One Pro? Do you have any other questions or suggestions? We are trying our best to meet more needs of our users. Leave your comments here. We are always happy to hear from you.