Mac Pro Boot Rom

It looks like 10.13.5 updated the Boot Rom on the Mac Pro 5,1 to MP51.0087.B00. This has been reported to miss the Intel microcode!

Another report indicates that Mojave Beta 2 flashes the older MP51.0085.B00.


My install did not revert the firmware.


Can firmware be reverted by the installer?

What are other Mac Pro users seeing?

Accepted Reply

>Can firmware be reverted by the installer?


AFAIK, no, only higher, never back.


Same thing w/phones, where beta firmware stays put when the OS is backed up, leaving a frankenOS that can only be leveled when the next release comes along.


Thanks for helping test.

Replies

My Mac Pro 2009 (flashed to 5,1 - upgraded processors and 7950 video card) said it needed an updated firmware, and it it's now MP51.0085.B00. Not sure about the microcode. But Mojave running surprisingly well, see image below.

>Can firmware be reverted by the installer?


AFAIK, no, only higher, never back.


Same thing w/phones, where beta firmware stays put when the OS is backed up, leaving a frankenOS that can only be leveled when the next release comes along.


Thanks for helping test.