Mac Hardware Diagnostic Tool For Old Mac

If you think your Mac may 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 your Mac

Mac Hardware Diagnostic Tool For Old Macs

  1. Shut down your Mac.
  2. Disconnect all external devices except your keyboard, mouse, display, Ethernet connection (if applicable) and connection to mains power.
  3. Make sure your Mac is on a hard, flat and stable surface with good ventilation.

How to Run Apple Hardware Test on a Mac to Diagnose Hardware Problems. Connect the Mac to a power source if you have not done so already; Disconnect all connected devices, drives, etc aside from a display / keyboard / mouse if applicable; Shut down the Mac, then boot the Mac and at the moment the screen turns from black to grey, hold down the. Just as addendum it is NOT ALWAYS on the first disk. On my Mac Pro 2009 the Apple Hardware Test is on the 'Applications Install' disk along with a ReadMe on how it works. I found this out after a frustrating number of attempts with disk one.

Start Apple Diagnostics

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

  1. Turn on your Mac and continue to press and hold the power button as your Mac starts up.
  2. Release when you see the startup options window, which includes a gear icon labelled Options.
  3. Press Command (⌘)-D on your keyboard.

Intel processor

  1. Turn on your Mac and then immediately press and hold the D key on your keyboard as your Mac starts up.
  2. Release when you see a progress bar or you're asked to choose a language.

Mac Hardware Diagnostic Tool For Old Macbook

Mac Hardware Diagnostic Tool For Old Mac

View the test results

Tool

Apple Diagnostics shows a progress bar while it's checking your Mac:

When testing is complete, Apple Diagnostics will show the results, including one or more reference codes. Find out more about Apple Diagnostics reference codes.

To repeat the test, click “Run the test again” or press Command-R. Best vic chesnutt songs.

To restart your Mac, click Restart or press R.

To shut down, click Shut Down or press S.

Mac Hardware Diagnostic Tool For Old Macdonald

To get information about your service and support options, make sure your Mac is connected to the Internet, then click ”Get started” or press Command-G. Your Mac will restart to a web page with more information. When you've finished, choose Restart or Shut Down from the Apple menu.

Mac Hardware Diagnostic Tool For Old Mac Os

Learn more

On an Intel-based Mac, if you can't start Apple Diagnostics with the D key, try these solutions:

Mac Hardware Diagnostic Tool For Old Machinery

  • Press and hold Option-D at startup to use Apple Diagnostics over the Internet.
  • Make sure your Mac isn't using a firmware password.