My iMac didn't come with DVDs and holding down D doesn't start the AHT. Tried running the firmware upgrade to access AHT over the internet; window says it doesn't work on my machine. How do I run AHT?
iMac, Mac OS X (10.7.3)
Posted on Sep 9, 2012 10:49 AM
Q: can't run Apple Hardware Test
Does AHT show up if you hold Option or alt key at bootup?
Try Apple's Express Lane...
https://expresslane.apple.com/