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macOS User Guide
- Welcome
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- Use Continuity across your devices
- Use your iPad as a second display
- Hand off between devices
- Insert photos and scans from iPhone or iPad
- Insert sketches from iPhone or iPad
- Copy and paste between devices
- Use Apple Watch to unlock your Mac and approve requests
- Make and receive phone calls on your Mac
- Control accessories in your home
- Send files between devices with AirDrop
- Use AirPods with your Mac
- Stream content to Apple TV
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- Understand passwords
- Use keychains to store passwords
- Reset your Mac login password
- Set up your Mac to be secure
- Guard your privacy
- Protect your Mac from malware
- Use Sign in with Apple for apps and websites
- Clear your Safari browsing history
- Manage cookies and other website data in Safari
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
If a disk can’t be repaired
If you see a message saying macOS can’t repair a disk, you may need to reformat it or replace it.
Back up as much of your data as possible, reformat by partitioning the disk, then restore your backed up data. For information about backing up data, see Ways to back up or protect your files.
If you continue to have problems with your disk, it may be physically damaged, and you may need to replace it. For service information, see Find out how to service or repair your Mac.
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