Can't get OS 10.11.6 nor High Sierra latest version to load with Original Mac Pro OEM installed ATI Radeon HD5770. What happens, is it will load and the progress bar under the apple will load about half way, before screen goes black. I have two of the original HD5770 cards and neither will go beyond that half mark. High Sierra will load with my rx580, but the point is to be able to use my Original card for boot screen access. I'm running 12 core dual 2.4ghz cpus until monday (upgrading to 2x 3.33ghz, or 2x 3.46ghz). I've seen tons of people using their original HD5770 to boot both of those OS'... but I cant. PLEASE HELP!!!!!!
Current setup is 2012 5,1 Mac Pro - 32gb ram - 12 core (2x 2.4ghz 6 core xeon cpus) High Sierra Latest Version, and a dual boot with El Capitan latest version.
Current setup is 2012 5,1 Mac Pro - 32gb ram - 12 core (2x 2.4ghz 6 core xeon cpus) High Sierra Latest Version, and a dual boot with El Capitan latest version.