After isolating an issue on your Mac to a possible hardware issue, you can use Apple Diagnostics to help determine which hardware component might be causing the issue. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.

When a Mac starts to act up, sometimes the problem is more than just a rogue software update. Sometimes, a hardware component goes bad. Here's how to diagnose and fix simple hardware problems. Therefore the only way to really make a judgement about the speed of the storage inside your Mac is to use a tool such as the BlackMagic Disk Speed Test, or the AJA System Test Lite (free from the. Apple Hardware Test (AHT) is a useful diagnostic CD made specifically for each Macintosh model, allowing the user to test his computer's components using that disc. They were given with the computer, but as usual, since so many people lose them, they need to be publicly archived.

BurnIn Test is a hardware diagnostic tool that enables the major hardware components of a computer system to be tested for stresses. This is used to determine the reliability, endurance, and stability of the system. The tool is ideal for conducting diagnostics and troublesahoots and also helps to avoid dead machine to clients. The hardware tests are built for a specific system, so if you have a restore disc that contains tests for a Mac Pro, you will not be able to use this on a Mac Mini or iMac system.

If your Mac was introduced before June 2013, it uses Apple Hardware Test instead.

How to use Apple Diagnostics

1. Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power.
2. Make sure that your Mac is on a hard, flat, stable surface with good ventilation.
3. Shut down your Mac.
4. Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding until you see a screen asking you to choose your language. When Apple Diagnostics knows your language, it displays a progress bar indicating that it's checking your Mac:
   
5. Checking your Mac takes 2 or 3 minutes. If any issues are found, Apple Diagnostics suggests solutions and provides reference codes. Note the reference codes before continuing.
   
6. Choose from these options:
   • To repeat the test, click ”Run the test again” or press Command (⌘)-R.
   • For more information, including details about your service and support options, click ”Get started” or press Command-G.
   • To restart your Mac, click Restart or press R.
   • To shut down, click Shut Down or press S.

If you choose to get more information, your Mac starts up from macOS Recovery and displays a web page asking you to choose your country or region. Click ”Agree to send” to send your serial number and reference codes to Apple. Then follow the onscreen service and support instructions. When you're done, you can choose Restart or Shut Down from the Apple menu.

Imac Hardware Check

This step requires an Internet connection. If you're not connected to the Internet, you'll see a page describing how to get connected.

Hardware Test For Mac

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Hardware Test Mac Startup

If holding down the D key at startup doesn't start Apple Diagnostics:

Hardware Test For Macbook Pro

• If you're using a firmware password, turn it off. You can turn it on again after using Apple Diagnostics.
• Hold down Option-D at startup to attempt to start Apple Diagnostics over the Internet.