OpenCore on the Mac Professional

I bought OpenCore put in on my early 2009 MacPro4,1 flashed to MacPro5,1 — working the newest Large Sur beta, Beta 7 (20A5374g).

GC-Titan Ridge on Slot Four additionally exhibits up appropriately.

Please see the display pictures connected.

A few observations that could be of curiosity: —

(1) For Large Sur Beta 7 besides appropriately beneath OpenCore, the VMM flag beneath Cpuid1Mask within the config.plist have to be set to on, i.e., “AAAAAAAAAAAAAACAAAAAAA==”. If set to off (‘AAAAAAAAAAAAAAAAAAAAAA==’), Large Sur Beta 7 will present the everyday huge grey-out energy button with multilingual languages asking you to restart your mac; and it’ll not boot to completion. This subject comes up solely in Beta 7 it appears, as a result of I didn’t encounter this in Betas 5, 6.

(2) I seen that I have to place my RX580 in Slot 2, and my StarTech NVME adapter with Samsung 960 Evo 250GB NVME in Slot 1 (and, in fact, Titan Ridge in Slot 4) to ensure that the MacPro besides to completion to the login display. This occurs beneath the Large Sur betas, and if I recall appropriately, Catalina and Mojave as effectively.

Does anybody know why the RX580 must be in Slot 2 and the NVME in Slot 1 to ensure that my Mac Professional besides to completion?

I might like to maneuver the RX580 to Slot 1 and the NVME to Slot Three with the Titan Ridge on Slot Four in order to enhance airflow — as a result of proper now, with the RX580 in Slot 2, its fan is spinning simply 1-2 mm beneath the Titan Ridge in Slot 4.

Any assist or perception on this slot order subject could be a lot appreciated.

Might or not it’s as a result of switching the Slots may maybe change the trail data (i.e., within the basic kind PciRoot(0x0)/Pci(0x0,0x0)/Pci(0x0,0x0) and so forth) that I receive from the acidandthera Github script after which specified within the config.plist — such that the conflig.plist would must be re-adjusted for the brand new slots? It will be tough for me to check this — since I solely have one Mac…..

Spent the entire of yesterday switching slots and reinstalling stuff however no luck figuring this subject out. Once more any assist could be welcome.

(3) OpenCore 0.61 doesn’t appear to work on my Mac Professional, for both Large Sur Beta 7 or Mojave. On the OC quantity choice display, deciding on a quantity (or letting it timeout and auto-select) besides merely reverts again to the quantity choice display; and this loop retains going. At the moment on OpenCore0.60, which works with Large Sur Beta 7.