DIAGNOSTIC TOOLS. Diagnostic tools for Apple Mac OS X. $0.00 - $16.00 $16.00 - $22.00 $22.00 - $28.00 $28.00 - $34.00 $34.00 - $40.00 Sort By: Quick view Compare. Apple Diagnostics, formerly known as Apple Hardware Test, can check your Mac for hardware issues. 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. A recent update to the tool also enabled macOS updates to be received through the Mac App Store, so even that aspect is vanilla now. Please note that if you are using a Hackintosh and not a real Mac then this tool is not needed. All that is required is that you no longer use the SMBIOS of an unsupported machine (for example Mac Pro 3,1). Apple Service Diagnostic (ASD) is Apple's bootable hardware testing console that lets you run extensive technical test routines on your Mac. Alternatively, Apple Hardware Test (AHT) is a simpler version of ASD that is already on most Mac OS X restore DVD's that shipped with your Mac. If you have an earlier Mac, the equivalent is called an Apple Hardware Test (AHT), but the basic principles are the same. To start using Apple Diagnostics or AHT, first turn off any firmware.

If you think your 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.

Mac Hardware Diagnostic Tool For Old Macbook

Prepare your Mac

1. Shut down your Mac.
2. Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power.
3. Make sure that your 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:

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 labeled Options.
3. Press Command (⌘)-D on your keyboard.
   

Intel processor

1. Turn on your Mac, 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.
   

View the test results

Mac Hardware Diagnostic Tool For Old Macdonald

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

When testing is complete, Apple Diagnostics shows the results, including one or more reference codes. Learn about Apple Diagnostics reference codes.

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

To restart your Mac, click Restart or press R.

To shut down, click Shut Down or press S.

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

Learn more

Mac Hardware Diagnostic Tool For Old Macs

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 Macbook Pro

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