Mac User Guide
- Welcome
- What’s new in macOS Tahoe
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- Intro to Apple Intelligence
- Translate messages and calls
- Create original images with Image Playground
- Create your own emoji with Genmoji
- Use Apple Intelligence with Siri
- Find the right words with Writing Tools
- Summarise notifications and reduce interruptions
- Use ChatGPT with Apple Intelligence
- Apple Intelligence and privacy
- Block access to Apple Intelligence features
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- Intro to Continuity
- Use AirDrop to send items to nearby devices
- Hand off tasks between devices
- Control your iPhone from your Mac
- Copy and paste between devices
- Stream video and audio with AirPlay
- Make and receive calls and text messages on your Mac
- Use your iPhone internet connection with your Mac
- Share your Wi-Fi password with another device
- Use iPhone as a webcam
- Insert sketches, photos and scans from iPhone or iPad
- Unlock your Mac with Apple Watch
- Use your iPad as a second display
- Use one keyboard and mouse to control Mac and iPad
- Sync music, books and more between devices
- Resources for your Mac
- Resources for your Apple devices
- Copyright and trademarks
What is a firmware password on Mac?
A firmware password prevents users who don’t have the password from starting up from any internal or external storage device other than the startup disk you’ve selected. It also blocks the ability to use most startup key combinations.
To create a firmware password, start up your Mac from macOS Recovery by pressing and holding the Command and R keys immediately after turning on your Mac. When the Recovery window appears, choose Utilities > Firmware Password Utility (OS X Mountain Lion through macOS Sierra) or Utilities > Startup Security Utility (macOS High Sierra or later). These utilities are available only on Mac models that support use of a firmware password. To learn more, see the Apple Support article Set a firmware password on your Mac.