Just got my Mac Pro 5,1 tonight! Dual 3.33, 12 core 128 g RAM 500 SSD. I was doing some installations (Pro Tool, iLok, and a Lexicon IO82 driver etc,). I went to the can, came back and it’d shut down. Won’t power up again. Checked the power cable, connection etc. but, nothing. Last install...
forums.macrumors.com