I’ve had an issue with my Mid-2010 Mac Pro (5.,1) for over a year now…the machine still runs fine when it is on, but has the issues with startup/sleep described below. I’ve spent many hours reading posts on the Apple Support community, Macrumors, and elsewhere. From what I have gathered, nobody seems to understand why the computer behaves this way, and people inevitably end up replacing their PSU to fix the problem.
Has anyone ever discovered the cause of this type of problem and/or can anyone suggest a fix other than replacing the PSU? Given that I now have to buy a new (Metal compatible) video card in order to upgrade the OS to Mojave, I really can't afford to also get a refurb PSU at the same time. I am hoping to find a less drastic fix if possible.
EDIT: I found this cryptic and very unhelpful discussion relating to what seems to be the same symptoms, but the solution is articulated so poorly in the post I don't understand what they are talking about. How does the power button "change to a sleep button", and if so how does one change it back? This sounds like the power management changes implemented in Mavericks, but I'm not sure it's relevant anyway:
https://discussions.apple.com/thread/6646621
Issues
Things I have done to try to fix this problem:
Mac Pro Mid 2010 (MacPro 5,1)
Quad Core 2.8 GHz
24 GB RAM
Radeon HD 5770
Samsung EVO 840 SSD (Boot)
2x Western Digital 2TB HDD
1x Western Digital 1TB HDD
Stock OEM DVD-RW
Inatek USB 3.0 card (Installed long after issues began)
OS X 10.11.6 El Capitan (Issue first surfaced when using OX 10.9 Mavericks)
Has anyone ever discovered the cause of this type of problem and/or can anyone suggest a fix other than replacing the PSU? Given that I now have to buy a new (Metal compatible) video card in order to upgrade the OS to Mojave, I really can't afford to also get a refurb PSU at the same time. I am hoping to find a less drastic fix if possible.
EDIT: I found this cryptic and very unhelpful discussion relating to what seems to be the same symptoms, but the solution is articulated so poorly in the post I don't understand what they are talking about. How does the power button "change to a sleep button", and if so how does one change it back? This sounds like the power management changes implemented in Mavericks, but I'm not sure it's relevant anyway:
https://discussions.apple.com/thread/6646621
Issues
- Computer will not power on when power button is pressed (push button relay clicks, then nothing)
- To power on, I must hold down the power button for several seconds until relay click is heard, release power button, then press power a second time and the computer will power on.
- However, IF the computer has recently been shut down (i.e. the machine is warm and has been running), hitting the power button once will immediately turn on the computer (in other words, the power button works normally).
- Computer will not wake from deep sleep.
- Computer usually (but not ALWAYS) fails to automatically start up if set to do so.
- On the rare occasions the computer does start itself up (I had it set to boot up and run backup tasks overnight), it almost always fails to shut itself down if set to do so.
Things I have done to try to fix this problem:
- Check Energy Saver Settings
- Reset NVRAM
- Reset SMC
- Replace backup battery on logic board
- Upgrade OS X (twice, though not an archive and install)
- Remove all disk drives, expansion cards, and memory DIMMS and check they are seated properly
- Innards have been cleaned a dozen times
Mac Pro Mid 2010 (MacPro 5,1)
Quad Core 2.8 GHz
24 GB RAM
Radeon HD 5770
Samsung EVO 840 SSD (Boot)
2x Western Digital 2TB HDD
1x Western Digital 1TB HDD
Stock OEM DVD-RW
Inatek USB 3.0 card (Installed long after issues began)
OS X 10.11.6 El Capitan (Issue first surfaced when using OX 10.9 Mavericks)
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