Once your language has been selected, the Apple Hardware Test console appears. You can choose which sort of test or tests to perform: To perform all of the basic tests, click the Test button with the mouse or press the T key or the Return key on your keyboard. Like this: Like Loading Comments 6 Leave a comment. Patrick Gallagher.
Would imaging have blown this away? Yes, erasing and imaging could blow away the AHT partition.
Can one recreate this diagnostic partition somehow if the drive gets wiped for whatever reason? Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public.
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How to use Apple's hardware diagnostics to find and fix Mac glitches | ZDNet
Marcel on Zoom vulnerability and remedia…. The Apple Diagnostics has detailed steps on how to shut down your Mac, which peripherals to disconnect, and how to hold down the D key at boot. Note that there is no prefix key used here. Hold down just the D key right after you hear the startup chime. You should review this Apple Diagnistics page and even print it so you have a handy reference during the testing.
Especially useful are the keyboard shortcuts that are available. After booting, you'll see a black screen with a progress bar when the Apple Diagnostics start. The test takes only a few minutes.
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When it's done, you see a notice with error Reference codes that describe the likely problem. Apple has an extensive page of error Reference codes t hat describe the problem s found, if any. If you get the code ADP, "No issues found," you can reconnect your peripherals, reboot and look for the trouble elsewhere. Otherwise, follow the steps listed on the Reference codes page linked above.