When you're done, choose Restart or Shut Down from the Apple menu. Your Mac will restart and open a webpage with more information. Then click Get started or press Command-G. To get more information about your service and support options, make sure that your Mac is connected to the internet. To repeat the test, click Run the test again or press Command-R. A diagnostic screen pops up with buttons for a variety of tests. When it's finished testing your machine, the results will be shown, including one or more reference codes to help you identify any potential issues (refer to Apple's support page to learn more about reference codes). Apple Diagnostics shows a progress bar while its checking your Mac: When testing. Release the D key when you see a progress bar or you're asked to choose a language.Īfter you've followed the above steps, Apple Diagnostics will begin to run on your Mac.Press the power button to turn on your Mac, then immediately press and hold the D key on your keyboard as your Mac starts up.How to Use Apple Diagnostics on an Intel Mac Press the Command-D key combination on your keyboard.
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