Save space by storing your content in iCloud or using built-in tools to find and remove large or unneeded files.
Optimized Storage helps you save storage space 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.
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.