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Mac won’t run Diagnostic

The option+D nor the D key won’t run the Diagnostic on my mid 2010 Mac.

iMac 21.5", OS X 10.10

Posted on Jun 18, 2019 6:46 AM

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Question marked as Top-ranking reply

Posted on Jun 18, 2019 6:57 AM

Greetings!

Here is the instruction: How to use Apple Hardware Test on your Mac - Apple Support

Seems that you have old system on your Mac (like 10.7 or 10.6). Please note, that if you're using OS X Lion v10.7 or earlier and you can't get Apple Hardware Test to start, see if you have an OS X installation disc named “Applications Install Disc 2.” Insert the disc in your internal optical drive or external Apple SuperDrive before following the steps, described in the above-mentioned article.

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Question marked as Top-ranking reply

Jun 18, 2019 6:57 AM in response to cerette

Greetings!

Here is the instruction: How to use Apple Hardware Test on your Mac - Apple Support

Seems that you have old system on your Mac (like 10.7 or 10.6). Please note, that if you're using OS X Lion v10.7 or earlier and you can't get Apple Hardware Test to start, see if you have an OS X installation disc named “Applications Install Disc 2.” Insert the disc in your internal optical drive or external Apple SuperDrive before following the steps, described in the above-mentioned article.

Jun 18, 2019 6:51 AM in response to cerette



  • Some Mac computers that shipped with OS X Lion v10.7 or later will start up from AHT over the Internet if your startup disk doesn't contain AHT, or if you hold down Option-D at startup. This requires an Internet connection over Ethernet or Wi-Fi.
  • If you're using OS X Lion v10.7 or earlier and you can't get AHT to start, see if you have an OS X installation disc named “Applications Install Disc 2.” Insert the disc in your internal optical drive or external Apple SuperDrive before following the steps above. Or, if you're using a MacBook Air (Late 2010), plug the MacBook Air Software Reinstall thumb drive into your USB port instead.



Mac won’t run Diagnostic

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