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Since the Big Sur upgrade my Mac Pro always requires me to use the NVRAM reset to use the machine. Any clues as to why this is happening and how I can return to just switching on the machine with the power button?
Thx!
Mac Pro
On the silver tower models, if you can upgrade memory without drawing blood, you can remove and test for 3 volts or replace the PRAM backup battery. Just use a bright light and understand what is retaining the battery before acting -- breaking the battery holder can ruin your day.
On the late 2013 dark cylinder models, only you can decide whether the 32-step teardown is within your abilities -- illustrated procedures can be found online. In my opinion it is not difficult, just complicated.
On the silver tower models, if you can upgrade memory without drawing blood, you can remove and test for 3 volts or replace the PRAM backup battery. Just use a bright light and understand what is retaining the battery before acting -- breaking the battery holder can ruin your day.
On the late 2013 dark cylinder models, only you can decide whether the 32-step teardown is within your abilities -- illustrated procedures can be found online. In my opinion it is not difficult, just complicated.
startup issues related to PRAM/NVRAM can also be related to the PRAM Backup battery, especially if they occur after a power interruption.
Your Mac uses a nominal 3 Volt long-life non-recharging Lithium coin cell to maintain the parameter PRAM/NVRAM. If it dies, it can be very difficult to start up. Commonly-available CR2032 can be used as a replacement.
On Mac Pro silver towers, it is half-hidden behind the graphics card slot. On your late 2013 dark cylinder, it requires a 32-step teardown to gain access to the battery holder.
Thanks Grant, this certainly sounds to be the culprit. I have a silver tower, is the battery replacement a straight forward task or best left to the tech gurus?
Are there any available 'how to' instructions I can go to?
Many thanks!
Appreciate your time on this Grant. Looking at the steps I think I need to find someone more capable to do it. As you say, not difficult, just complicated, and I can't risk an error!
Thank you again!
it may be some external connected .one by one remove and try. You don't mention MP model or anything else to assist.
Thanks!
I will try that.
The Apple Mac Pro is the late 2013 version - Bean Can, if that adds anything....
Thanks again.
NVRAM no Longer Resetting Requiring OP+CTRL+P+R to Switch On My Mac Pro Every Time
