Optimise storage space on your Mac
macOS can help make more room on your Mac by optimising its storage. When space is needed, it keeps files, photos and videos, Apple TV films and programmes, and email attachments in iCloud, and makes them available on demand. Files don’t take up space on your Mac, and you can download the original files when you need them. Recent files and optimised versions of your photos are always on your Mac.
Choose Apple menu > About This Mac, click Storage, then click Manage.
macOS calculates how much space is being used by different categories.
Note: Wait until all categories are finished being calculated to ensure you’re seeing the accurate amount of space. Values are refined as each category is calculated.
View the recommendations and decide how to optimise storage on your Mac.
Store in iCloud
Helps you store files from your Desktop and Documents folders in iCloud Drive, store photos and videos in iCloud Photo Library, store messages and attachments in iCloud, and optimise storage by keeping only recently opened files on your Mac when space is needed.
You can modify these settings later in iCloud preferences, Photos preferences and Messages preferences.
Save space by automatically removing Apple TV movies and TV shows that you already watched and by keeping only recent email attachments on this Mac when storage space is needed.
Empty Trash Automatically
Automatically erase items that have been in the Trash for more than 30 days. You can modify this setting later in the Finder. See Delete files and folders.
Quickly find files, apps, books, films and other items that are taking up space, then manually delete items you no longer need. See Find and delete files.
When space is needed on your Mac, macOS also clears caches and logs that are safe to delete, including temporary database files, interrupted downloads, staged macOS and app updates, Safari website data and more.
Note: If your disk is partitioned, recommendations apply to only the partition that contains your home directory.
To see an overview of used and free disk space, choose Apple menu > About This Mac, then click Storage. See available storage space.