Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

reukiodo

macrumors 6502
Nov 22, 2013
416
218
Earth
I haven't tried, but I would expect it to boot it only CPU A is installed correctly, and not expect it to boot if only CPU B is installed correctly.
 

donluca

macrumors regular
Jul 30, 2018
193
94
Italy
Correct. On dual CPU trays, if you put one CPU in Socket A and a stick of RAM in socket 1 it will boot.
 

jessecampbell

macrumors newbie
Feb 26, 2020
7
3
Sorry to bring this back from the dead... Do you use the 4,1 -> 5,1 firmware upgrade tools and firmware to do this to an xserve? I'm rescuing an '09 xserve that's been languishing on a shelf for a few years to run some mac VMs and builds, loading it up with ram and ssd and hopefully x5690's
 

P1ratz

macrumors member
Jul 14, 2019
51
9
I extracted the mac pro boot rom from the last version of mojave and used rom tool to install.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.