Identify and troubleshoot hardware issues with Apple Diagnostics
Apple Diagnostics is a diagnostic tool to identify and troubleshoot hardware issues on Apple devices. You can obtain detailed reports on the status of hardware components such as memory, logic board, and wireless modules. This diagnostic information allows you to quickly determine whether a problem is hardware-related, differentiate it from software issues, and provide accurate guidance on necessary repairs or service options.
Use Apple Diagnostics to test Mac
Apple Diagnostics, formerly known as Apple Hardware Test, can check Mac for hardware issues. If you think a Mac might have a hardware issue, you can use Apple Diagnostics to help determine which hardware component might be at fault. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.
Prepare the Mac
If you can, install the latest macOS updates, do so before continuing.
Shut down the Mac.
Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power.
Make sure the Mac is on a hard, flat, stable surface with good ventilation.
Start Apple Diagnostics
Determine whether you’re using a Mac with Apple silicon, then follow the appropriate steps:
Press and hold the power button on the Mac. (Every Mac has a power button. On laptop computers that have Touch ID, press and hold the Touch ID button.)
As you continue to hold the power button, Mac turns on and loads startup options. When Options appears, release the power button.
Press and hold Command (⌘)-D on the keyboard.
You may be asked to choose a language and make sure that you have an active network connection. You can use the Wi-Fi menu in the upper-right corner of the screen to choose a Wi-Fi network.
View the test results
Apple Diagnostics shows a progress bar while it’s checking the Mac. When testing is complete, Apple Diagnostics shows the results, including one or more reference codes:
To repeat the test, click “Run the test again” or press Command-R.
To restart Mac, click Restart or press R.
To shut down, click Shut Down or press S.
To get information about service and support options, make sure the Mac is connected to the internet, then click “Get started” or press Command-G. The Mac restarts to a webpage with more information. When you’re done, choose Restart or Shut Down from the Apple menu.
If Apple Diagnostics confirms a hardware failure, escalate to your device management administrator to determine options for your organization’s repair procedures. Your organization might also have the option to perform a self-service repair.