It's possible to add the GOP by yourself to such an old card. You can Google about it.Thanks. How could I have checked this myself?
However, to keep it simple, please expect no boot screen with any GPU that below AMD RX460.
It's possible to add the GOP by yourself to such an old card. You can Google about it.Thanks. How could I have checked this myself?
Can OpenCore be used to boot a Snow Leopard disk? I take it for granted it can also boot up High Sierra. Correct?
I haven't adopted OpenCore yet, as I still have some doubts. I don't particularly like the idea of fiddling with the VMM flag, as it appears you have to set it on and off (unless one is happy to take a 5% performance hit). On the other hand, if I were to permanently identify the Mac Pro 5,1 motherboard and the computer itself as an iMac Pro, wouldn't there be other problems, such as Continuity/Handoff/Airdrop functionality. Would FaceTime work. Would Messages work? Would Auto Unlock with the Apple Watch work? If one adopts an iMac Pro identity, what would the computer serial number be? The original one (i.e., that of a Mac Pro 5,1) or one befitting an iMac Pro?
Look, fully SMBIOS spoofing another Mac has several other implications, like sleep not working correctly and other problems. No solution is really perfect, the best compromise is to use it without SMBIOS enabling VMM when updates are released - unless you use AMD hardware acceleration.I haven't adopted OpenCore yet, as I still have some doubts. I don't particularly like the idea of fiddling with the VMM flag, as it appears you have to set it on and off (unless one is happy to take a 5% performance hit). On the other hand, if I were to permanently identify the Mac Pro 5,1 motherboard and the computer itself as an iMac Pro, wouldn't there be other problems, such as Continuity/Handoff/Airdrop functionality. Would FaceTime work. Would Messages work? Would Auto Unlock with the Apple Watch work? If one adopts an iMac Pro identity, what would the computer serial number be? The original one (i.e., that of a Mac Pro 5,1) or one befitting an iMac Pro?
Sure, Big Sur changed things, but for now VMM spoofing and hybrid mode for people that need AMD hardware acceleration is the best solution for Catalina. Too soon to know implications of changes needed for Big Sur.Yes, OpenCore can boot Snow Leopard and High Sierra.
Well, we have it on good authority (@vit9696) that full spoofing with properly generated identifiers is actually the best approach. All the features you mention should just work without any problems. The identifiers (including the serial number) should be those appropriate for the model you choose (iMac Pro).
When we developed the VMM-flag and hybridization strategy, the idea was to preserve as much as possible the original machine's identity. This seemed like a good idea, and because the strategy has proven safe and effective, we have just stuck with it, but with Big Sur, things are different (VMM is ineffective), and we may very well opt for full spoofing...
DRM video playback with Safari will work for Netflix/Prime when you enable AMD hardware acceleration, but it's a much more complex topic than video playback.Is the Hardware acceleration for video playback?
Please, excuse my ignorance. Up to now, I've assumed I only need to modify the EFI volume of my Catalina and my Windows (Boot Camp) internal disks. However, do I also need to modify the EFI volume of my Snow Leopard disk (High Sierra is also on the same disk as Snow Leopard)?Can, I boot Snow Leopard ASD via OpenCore with the Radeon VII
View attachment 935559
You only need to install OpenCore once, on ANY EFI partition. You don't need to modify the macOS EFI volume, or Windows EFI volume. You can install that even on a USB thumb drive EFI volume which is completely empty.Please, excuse my ignorance. Up to now, I've assumed I only need to modify the EFI volume of my Catalina and my Windows (Boot Camp) internal disks. However, do I also need to modify the EFI volume of my Snow Leopard disk (High Sierra is also on the same disk as Snow Leopard)?
Disable SMBIOS spoofing for Catalina installation / update.Hello,
first of all: Thank you for all your work. Great wiki (first post) that helped me to build my own config file (attached)
Everything works great - OC 0.5.9 (my version) and the HW Acc (Lilu 1.4.5 / WhateverGreen 1.4.0) and the OpenCanopy Boot Picker. Today I try to make a test install of macos 10.15 with the original installer from Apple. I prepare the config file (attached) with the Cpuid1Mask value to get the VMM status and also I proof the config file before (see picture VMM-Valid-Config). I reboot and test the VMM status (it's there) but then I get a big surprise: The macos 10.15 installer shows me up all APFS drives greyed out and only a HFS+ drive for valid install - I don't try to install there because of importand data. If I click the drive where I want to install 10.15 a small baloon help shows me the hint that I need a firmware update before. I can press the drive icon but there is NO install button that I can click.
The config file is build by myself... I double check my entrys but I am not be able to find my mistake. I am looking for help / a hint...
Thank's for reading.
You only need to install OpenCore once, on ANY EFI partition. You don't need to modify the macOS EFI volume, or Windows EFI volume. You can install that even on a USB thumb drive EFI volume which is completely empty.
OpenCore is a boot loader. It's NOT an additional software that must attach to the OS drive.
Once you installed a copy of OpenCore, boot via it, you can use it to boot to any other supported OS drive.
Disable SMBIOS spoofing for Catalina installation / update.
Catalina is on a NVME drive (970 EVO SSD 1TB) mounted in a PCIe adapter.
Thanks
Follow up to post #2870
I continued to have problems where each restart or shutdown I had to reset the NVRAM or it would never reach a boot loader. I tried many solutions including the ones suggested (thanks) but without success. I finally moved OC to another EFI on a SATA data drive (not the original Mojave disk). I then booted into recovery and blessed that new EFI. Now it boots to the OC bootpicker without resetting the NVRAM. As a test before doing this I moved it to a USB and that worked too. Decided in the end to internalize it and not tie up a USB port.
Check console, if there is a GPURestart crash report (when freeze happened), then most likely it's macOS issue.Hm, after updating to Catalina 10.15.6 I am experiencing issues related to the Hardware Acceleration, at rare or pretty specific times one of my screens start to turn on and off, the entire system freezes except the cursor, and just once happened that a bunch of saturated colors appeared on my secondary display.
Has this happened to anyone? I enabled acceleration on my RX480, it was working fine on 10.15.5
Yes, that works.@h9826790 do you tried to upgrade BigSur through opencore spoofing using the new method that apple labels "Incremental update image"
View attachment 936614
I made an attempt here (my customized opencore setup is based on 0.5.9): https://forums.macrumors.com/thread...unsupported-macs-thread.2242172/post-28699756
but after the "BigSur OTA update" starts to download then fails some checks, maybe the sealed snapshot volume is the issue.
Yes, that works.
View attachment 936629
Once click the "More info..." it will download the 4.xxGB incremental update image, but not the full 12.88GB full update image.
View attachment 936630
That means that the kexts can't load.yes, the small updater works
but allways: no H264 HWacc, PCIe drives are external
and kernel panics with dual CPU
:- (
That means that the kexts can't load.