User profile for user: Guy Ivie
Guy Ivie Author
User level: Level 2
470 points

Mac Pro 5,1 power supply issues

My 2010 Mac Pro 5,1 (46 gb RAM, 500 gb SSD boot drive) has been having what I assume is a power supply problem. I press the power button and get only a clicking sound from the vicinity of the power supply. After a few seconds, there is a second clicking sound. Then when I press the power button a second time, I get juice and the Mac boots. (If I don't wait for that second click, nothing happens.)


I replaced the button battery about a month ago. Resetting the SMC doesn't make any difference to this problem. I'm concerned that maybe the PSU is getting ready to die. If it does, am I stuck buying a secondhand Apple Mac Pro PSU (with a limited life span), or is there a relatively easy means of modifying a regular PSU from Silverstone or another manufacturer?


Posted on Dec 23, 2019 6:31 AM

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5 replies
User profile for user: sterling r
sterling r
User level: Community Specialist

Dec 25, 2019 1:50 PM in response to Guy Ivie

Hey there Guy Ivie,


Thanks for reaching out to Apple Support Communities. I understand your Mac is not powering on and possibly charging as expected. I’ll be happy to help.


Doing an SMC reset is a good step to take for this. Go through the rest of the steps in this link and see if they have any impact on this issue:


If your Mac doesn't turn on or start up


These links offer some other helpful steps as well:


If your Mac battery won’t charge

Apple Portables: Troubleshooting MagSafe adapters


I hope this helps.

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User profile for user: Guy Ivie
Guy Ivie Author
User level: Level 2
470 points

Dec 25, 2019 3:26 PM in response to sterling r

Sterling,


I do appreciate you taking the time to respond. However, it seems as if you did not actually read what I wrote.


  1. This is a Mac Pro, which is a desktop computer, not a portable. Therefore any links to information about charging batteries or MagSafe adapters do not apply.
  2. My Mac Pro does power on. It just takes 2 attempts, and there is that odd clicking.
  3. I have already reset the SMC (several times, actually) and that does not help.
  4. You didn't address my question about replacing the PSU.


Regards,


Guy


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Mac Pro 5,1 power supply issues

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