Anyway, if you want to upgrade from Mojave to Catalina by using OpenCore, use this package may be easier. (please spend some time to read through these two posts)10000Thx!
Anyway, if you want to upgrade from Mojave to Catalina by using OpenCore, use this package may be easier. (please spend some time to read through these two posts)
Activate AMD hardware acceleration
I created a new "easy to install package" as per many requested (based on the official OpenCore). [The attached package updated to 1.0.0] For those who only need HWAccel, post #594 has everything you need. This new package mainly offer HWAccel + boot screen. Also, this package should work in...forums.macrumors.com
Activate AMD hardware acceleration
No. If you want to install / upgrade to / update Catalina, you have to turn ON the VMM flag. And turn OFF SMBIOS spoofing. After that you should turn the VMM flag OFF and SMBIOS spoofing ON. Otherwise, CPU Turbo Boost and HWAccel will be disabled, not that good for daily use.forums.macrumors.com
roobarb!
Thanks for all the HELP and time you have taken to try and set me straight!
Last piece for me is:
(Pardon My Ignorance) but how do I “Bless” the Partition?
Can you elaborate on this please? You set the VMM flag in the config file, reboot and...SO, I'm having an issue in which I cannot seem to set the VMM flag on 10.15.4. Any insight as to why this is?
When checking to see if VMM is enabled using Terminal, it's not in the list of enabled featuresCan you elaborate on this please? You set the VMM flag in the config file, reboot and...
When checking to see if VMM is enabled using Terminal, it's not in the list of enabled features
sysctl -a | grep machdep.cpu.features
machdep.cpu.features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA CMOV PAT PSE36 CLFSH DS ACPI MMX FXSR SSE SSE2 SS HTT TM PBE SSE3 PCLMULQDQ DTES64 MON DSCPL VMX SMX EST TM2 SSSE3 CX16 TPR PDCM SSE4.1 SSE4.2 POPCNT AES VMM PCID
First of all, make sure the RX580 with the factory ROM.Hello! Tried last night but not success!
Dark screen and cannot boot up
My config:
RX580 plus dual mon: LG 5K2K 21:9 (DP) and asus 2K mon HDMI
(tried only Asus and it is same)
cMP firmware:144.0.0.0
Mac OS lastest Mojave
Boot drive: intel 660p NvEM SSD in slot 2
Catalina install drive: Sata bay1
following step:
1. Disable SIP (always)
2. Get the attachment (done)
3. Unzip the file (done)
4. Use the app the mount boot EFI drive (mount intel SSD and nothing inside the drive, I create EFI folder and copy 2 folders to EFI folder)
5. run the automation file (done)
6. Reboot
Dark screen and I have read my intel SSD is no reaction the read write light in PCIe card No flash.
Would you please advise if I have any mistake?
I can remove all drive reset NVram and boot from usb.Set boot from USB I can plug the intel SSD back and redirect to boot from old Mojave.
Thanks!
Yes it is second hand card. bought long time ago.First of all, make sure the RX580 with the factory ROM.
I've seen lots of cases that the users bought a used card with flashed mining ROM, which breaks the GOP, and the boot screen won't work.
Copy! I try tonight~Simply backup your current ROM, and flash it with a factory ROM (can be download from TechPowerUp) should be easier.
I've being using dism for years, I prefer to use it since it's a much more reliable way to install Windows UEFI than cloning pre-configured images.Using dism, I successfully installed Windows in UEFI mode, and with ProtectSecureBoot enabled in OpenCore, my BootROM has remained free of certificates! (Admittedly, the first attempts to start Windows after the installation were hit or miss. I faced a similar issue described earlier in this thread—hang on Windows logo with no spinner. But after installing the latest drivers and updating Windows, all attempts to start Windows have been successful.) I can boot into Windows using Startup Disk or the OC boot picker. To ensure that Windows only ever boots through OC, I installed Windows on a disk in Bay 2, and moved OC to the EFI partition of a disk in Bay 1 (which is the default after resetting the NVRAM).
I can confirm this method of installing Windows works on dual boot drives. I have created a Windows partition on a Catalina drive and succesfully installed Windows in EFI mode through Virtualbox. Just make sure the Catalina partitions inside the container are unmounted (they tend to automatically mount so keep unmounting until you successfully boot the virtual box machine) and the Windows partition as well.Downloaded latest Microsoft link Still same error , is it something with pcie ssd or being partitioned?
Just curious, anyone has OSX drive laying around? I sold my Yosemite drive already, too lazy to make another one just run a "test for fun".
Theoretically, we can now boot Snow Leopard on 5,1 via OpenCore boot screen with RX580 (or some other non supported GPU like Radeon VII etc). Of course, no acceleration will work, but we should able to see the screen, and use it (at least should work for some simple stuff).
Anyone want to try?
You 100% follow the steps in post #1?Trying to install Catalina on my old dual socket 4,1 and running into problems. I updated to Mojave and 144.0.0.0.0. I installed Open Core. I created a modified APFS disk EFI disk with the VMM flag set and tried to install Catalina to the drive but the installer complained that it couldn’t verify my firmware so wouldn’t install on and APFS disk. The dialog wanted me to choose an HFS+ disk. So I repeated open core step on HFS+ and installed Catalina to it. The Calalina installer go t further this way but after reboot and some time I’d get the same firmware not verified message. Any clue what I’m doing wrong here?
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