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macOS User Guide
- Welcome
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- Continuity
- Hand off between devices
- Insert photos and scans from iPhone or iPod
- Copy and paste between devices
- Unlock your Mac with Apple Watch
- Make and receive iPhone calls in FaceTime
- Get SMS texts from iPhone in Messages
- Control accessories in Home
- Send files between devices with AirDrop
- Use AirPods with your Mac
- Stream content to Apple TV
- Resources for your Mac
- Resources for your Apple devices
If you can’t start up your Mac after resetting NVRAM or PRAM
If you have a Redundant Array of Independent Disks (RAID) scheme set up, your Mac may not start up if you reset NVRAM or PRAM when you restart.
Press and hold the Option key while you restart your Mac.
When you see the prompt, select your startup disk.
After your Mac starts up, choose Apple menu > System Preferences, click Startup Disk, then select your startup disk.
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