If your Mac is from 2012 or earlier and has OS X 10.8.4 or later, use Apple Hardware Test, which is built into your Mac. If your Mac is from 2012 or earlier and has OS X 10.8.3 or earlier, use the system software disc or USB flash drive that came with your Mac. Music, TV, and podcasts take center stage. ITunes forever changed the way people experienced. By knowing your exact Model Identifier (MacBokPro?,?) you could look in to this data base for the correct version of AHT to download. Examples: MacBookPro1,1 3A106 MacBookPro1,1 3A107 MacBookPro2,1 Mac-F42189C8 MacBookPro2,2 Mac-F42187C8 MacBookPro3,1 Mac-F42388C8 MacBookPro3,1 Mac-F4238BC8 MacBookPro4,1 Mac-F42C86C8 MacBookPro4,1 Mac-F42C89C8 MacBookPro5,1 Mac-F42D86A9 MacBookPro5,1 Mac. Download GPU Test 0.7.0 for Mac OS. Test your GPU with GPU Test.

Mac os software, free download - Apple iOS 13, R for Mac OS X, Apple Mac OS X Mavericks, and many more programs. Note: Your test results will appear in the window in the bottom-right of the console. To exit AHT, click Restart or Shut Down at the bottom of the window. Some Macintosh computers that shipped with OS X Lion and later support the use of Apple Hardware Test over the Internet. Server version of Mac OS X is not supported; This software cannot be used on virtual operating systems such as Microsoft's Virtual Machine, Parallels, VMware, VMware Fusion or any other virtual environments. Internet connection for Download, Registration, Exam Download and Upload. Administrator level account permissions (Instructions).

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.

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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.

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

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

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• 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.