Chosen Solution
New Mac Pro suddenly doesn’t turn on? Yesterday it was working normal and nothing happened to it. Today it doesn’t turn on anymore, still seeing the back ports light from HDMI blinking sometimes when i try to turn on. Recently updated now using El Capitain 10.11.04 Reset the SMC on Mac desktop computers Follow these steps for iMac, Mac mini, Mac Pro, and Xserve. Shut down the Mac.Unplug the power cord.Wait 15 seconds.Plug the power cord back in.Wait 5 seconds, then press the power button to turn on the Mac. Any other idea to fix the problem and make the computer turn on again? Please help. Update (04/14/2016) Sorry Jozo but its a Mac Pro there isn’t a keyboard :( And its not turning on, I just get back from apple assistance nobody knows about it and they ask me 10 days to give me a feed back. I’m a mac fan for 10 years and after 8 computers I need to say this time was too much ….. time to get back to PC If I can give a tip, DON’T BUY THE NEW MAC PRO and another one….. don’t use El Capitain 10.11.4
Do you have your system on a good surge suppressor or UPS? Did you disconnect all of the external devices so you have just the core system with the keyboard & mouse/trackpad connected and was it still not able to boot up? One of the things you may need to look at is your buildings wiring. Get a line checker which can check the ground and power. You could have a bad ground service or a miswired outlet. Is the outlet 20 Amp (US) and is the outlets line isolated back to the breaker panel? While I’ve not encountered it with a Mac Pro I’ve seen power supplies in systems burnt by power surges, power outages & lightning. Which one good reason to have an expensive system plugged into a good UPS which protects your system from these events.
Try holding shift key during the powering on. Let us know if it helped.
More holy crap here. I found this answer and thought “Yeah, more BS on the internet , this will never work”. My Mac Pro 2013 was acting weird.. like Command +C would’nt work but both command and C worked independently. SO I thought maybe a reboot would fix it. But then nothing happen no boot noise, no ventilation. I disconnected everything and nobthing worked… Believe it or not after 20 minutes of despair this answer above the only solution. The computer rebooted after I indeed pressed shift while turning it on (nothing else connected except keyboard + thunderbolt 27 screen). Into Windows actually. Maybe this is aboot camp issue?
Hi guys, I have the same issue. I went to 3 different Genius Bars without any success. I’m quite desperate.
Did pressing the shift key really resolve the problem? Do you have to press it each time you power your Mac Pro on? Thx
