Apple Silicon iMac: Troubleshooting Quick Checks

Troubleshooting quick checks for all issues

1. Shut down or restart your Mac.

2. Start up the Mac in Safe Mode.

3. Check for macOS software updates. Then install macOS software and firmware updates.

4. Determine if the computer is in Device Firmware Update (DFU) mode. In this mode, the computer may be unresponsive and can appear to have an issue. To exit DFU mode, press and hold the power button for 10 seconds to attempt to shut down the computer. Then press the power button again to attempt to turn on the computer. If the computer turns on, it was in DFU mode and has power.

More resources

General

• Identify your iMac model

• Take a tour: iMac

Power and Startup Issues

• If your Mac doesn’t turn on

• If your Mac doesn't start up all the way

• If you can't start up from macOS Recovery

Wi-Fi and Bluetooth Issues

• Resolve Wi-Fi and Bluetooth issues caused by wireless interference

Input/Output Issues

• Identify the ports on your Mac

• About the video ports on Mac

• About the Thunderbolt ports on Mac

• Adapters for the Thunderbolt 4, Thunderbolt 3, or USB-C port on your Mac

• About the Apple Thunderbolt 3 (USB-C) Cable

• If you can't connect your Magic Keyboard, Magic Mouse, or Magic Trackpad to your Mac

Sound Issues

• About the audio ports on Mac

• If you can’t hear sound from your Mac speakers