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
- 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
- Resources for your Mac
- Resources for your Apple devices
- Copyright and trademarks
Diagnose problems on Mac
Apple Diagnostics is a tool you can use to diagnose problems with your computer’s internal hardware, such as the logic board, memory, and wireless components. You may be able to start your Mac with Apple Diagnostics, even if it doesn’t start using macOS.
To use Apple Diagnostics, follow the instructions in the Apple Support article Use Apple Diagnostics to test your Mac.
You may want to print the instructions before you begin. Choose File > Print, then click Print.
If Apple Diagnostics reports that your Wi-Fi card is not working properly, contact Apple or an Apple Authorized Service Provider for service. Repairs performed by untrained individuals or using non-genuine Apple parts may affect the safety and functionality of the device.
Apple Diagnostics doesn’t check external hardware components, such as a USB device, or non-Apple devices, such as PCI cards from other vendors. It doesn’t check for macOS or software-related problems such as app or extension conflicts.
If Apple Diagnostics doesn’t report a hardware problem with your Mac, there may be a problem with the macOS version you’re using and you may need to reinstall it. See Reinstall macOS.