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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
Verify your backup disk on Mac
If you back up to a network disk, Time Machine periodically verifies that your backups are in good condition. This scheduled verification happens automatically, but you can manually verify a backup at any time.
On your Mac, click the Time Machine icon
in the menu bar. Press and hold the Option key, then choose Verify Backups.
If the Time Machine icon isn’t in the menu bar, choose Apple menu 
> System Preferences, click Time Machine, then select “Show Time Machine in menu bar”.
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