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I attempted a restart while holding the D key in order to launch Apple Diagnostics. I however was greeted by this error message:
Error: 0x8000000000000003, Cannot Load 'EFI/Drivers/TestSupport.efi'
Status: 0x00000003
how to fix it
Hi tanakorn0666,
I'm not sure why AHT would fail this way; however, try booting it over the Internet. Hold down Option-D as you turn on or restart your Mac.
Hi tanakorn0666,
I'm not sure why AHT would fail this way; however, try booting it over the Internet. Hold down Option-D as you turn on or restart your Mac.
Apple Hardware Test (AHT) was Error:
