macOS User Guide
- Welcome
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- Work across devices using Continuity
- Use iPhone as a webcam
- Use iPhone with Desk View
- Stream audio and video with AirPlay
- Use one keyboard and mouse to control Mac and iPad
- Hand off between devices
- Unlock your Mac with Apple Watch
- Make and receive phone calls on your Mac
- Sync music, books and more between devices
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- What is Family Sharing?
- Set up Family Sharing
- Add a user or group
- Set up Screen Time for a child
- Share purchases with your family
- Watch and listen together with SharePlay
- Share a Photo Library
- Collaborate on projects
- Find content shared with you
- Find your family and friends
- Play games with your friends
- Resources for your Mac
- Resources for your Apple devices
- Copyright
Exclude files from a Time Machine backup on Mac
You can exclude items from a backup to save space on your backup disk, or to exclude items you back up using another method.
On your Mac, choose Apple menu > System Settings > General, then click Time Machine .
Click Options.
Click the Add button , then select one or more items to add to the list of excluded items. You can also drag items to the list.
To remove an item, select it in the list, then click the Remove button .
The backup disk is automatically listed in the list of items that shouldn’t be backed up.
Click Done.
Excluded items still appear in Time Machine local snapshots.
Important: When performing a backup, Time Machine excludes system files and apps installed during macOS installation. If your system is damaged, you must first reinstall macOS on your Mac, then use Migration Assistant to transfer information from a Time Machine backup.