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Mac Help
- Welcome
- Apps included on your Mac
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- Work across devices with Continuity
- Pick up where you left off with Handoff
- Send files using AirDrop
- Use your Mac to make and receive phone calls
- Get SMS texts from iPhone on your Mac
- Use an iPhone or iPad to connect your Mac to the Internet
- Use Apple Pay on your Mac
- Unlock your Mac with Apple Watch
- Stream content from Mac to Apple TV
- Resources for your Mac
- Resources for your other Apple devices
Determine which disk started up your Mac
Your Mac can be started up from a CD or DVD, a network volume, a different disk, or another operating system.
Choose Apple menu > System Preferences, then click Startup Disk.
See alsoChange your startup disk
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