Mac User Guide
- Welcome
- What’s new in macOS Sequoia
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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
Check your device’s Thunderbolt connection to Mac
If a Thunderbolt device isn’t working properly, it might not be correctly connected to your computer.
Check your Mac: Connect another device to the Thunderbolt port
on your Mac. If you can’t use that device, restart your Mac. If you still can’t use a device with the port, your Mac may need to be serviced. See Find out how to service or repair your Mac.Check chained devices: Disconnect all devices and cables from your Mac, then connect the device directly to your computer using its cable. If the device functions correctly, there may be a problem with one of the other devices. Try reconnecting the other devices and cables to your Mac, one by one. When you find the device causing the problem, review its documentation for further troubleshooting steps.