Mac User Guide
- Welcome
- What’s new in macOS Sequoia
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- Get started with Apple Intelligence
- Use Writing Tools
- Use Apple Intelligence in Mail
- Use Apple Intelligence in Messages
- Use Apple Intelligence with Siri
- Get webpage summaries
- Summarize an audio recording
- Create original images with Image Playground
- Use Apple Intelligence in Photos
- Summarize 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
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- Control what you share
- Set up your Mac to be secure
- Allow apps to see the location of your Mac
- Use Private Browsing
- Keep your data safe
- Understand passwords
- Change weak or compromised passwords
- Keep your Apple Account secure
- Use Mail Privacy Protection
- Use Sign in with Apple for apps and websites
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
- Copyright
Reinstall macOS
You can use macOS Recovery, the built-in recovery system on your Mac, to reinstall macOS. macOS Recovery keeps your files and user settings intact when reinstalling.
Important: Your computer must be connected to the internet to reinstall macOS.
Start up your computer in macOS Recovery:
On a Mac with Apple silicon: Choose Apple menu
On an Intel-based Mac: Choose Apple menu
Install the latest version of macOS compatible with your computer: Option-Command-R.
Reinstall your computer’s original version of macOS (including available updates): Option-Shift-Command-R.
Reinstall your current version of macOS: Command-R.
In the Recovery app window, click Reinstall macOS [name], then click Continue.
Follow the onscreen instructions.
In the settings where you select a volume, select your current macOS volume (in most cases, it’s the only one available).
On a Mac with Apple silicon or an Intel-based Mac with the Apple T2 Security Chip, use Erase Assistant to reset your Mac to factory settings before you trade it in or sell it. See Erase your Mac.