My Mac has returned (after 23 days)
23 days with the Mac Genius and it was solved by a random event.
Turns out the fan on the video card was not spinning. The card was ‘working’ when it ran through the hardware checks, but apparently that doesn’t check to see if the fan is spinning or not. The card overheated and the system shutdown.
The guys had the machine open and just noticed it wasn’t spinning. Sometimes a quick look is better than an extensive diagnostic.
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