On numerous occasions we've extolled the virtues of Apple's Hardware Test disc as a first step in investigating potential hardware issues that result in problems with startup, repeated kernel panics, ...

Formerly known as Apple Hardware Test, Apple Diagnostics is a system-integrated feature on newer Macs running macOS Big Sur and macOS Monterey that can check your Mac for hardware issues. This article ...

I have a 2008 (3,1) Mac Pro running running ML and can't get the Hardware Test to run. I don't have a Hardware Test disk, or if there is one, I can't find it. Apple instructions say to hold down the ...