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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
The manual says: "Note 2: On macOS 12.0 and above, it is no longer possible to specify trim timeout. However, trim can be disabled by setting 0."

So does this mean that specifying 4294967295 when booting Monterey does something or not?
The manual is not a beacon of clarity and, frankly, is outright terrible on this item.

My understanding of the state of things is summarised in this post:
 
From your post:

SetApfsTrimTimeout = 1 to 4294967295
  • OpenCore explictly changes the TRIM timeout from a default value to the set value while booting
    • It is not clear if this also means OpenCore swiches it ON when it is otherwise OFF
  • The OS does whatever it is set to do after boot
  • NB: The boot time TRIM timeout cannot be changed/set as of MacOS 12.0
    • It is not clear if there is even still a default in MacOS 12.0 and later

Just out of interest, how would you switch TRIM to OFF other than by using Set ApfsTrimTimeout? Not that I have any intention of doing so.

If boot-time TRIM timeout cannot be changed / set as of macOS 12.0, do the values you mention only apply to Big Sur and earlier?

Alternatively, as I mentioned before, there is certainly a difference between settings of 0 and 4294967295 in terms of boot duration. Are you saying that any number other than 0 will essentially just turn on boot-time TRIM, with the actual value disregarded by macOS?
 
How would you switch TRIM to OFF other than by using Set ApfsTrimTimeout?
sudo trimforce enable or disable in Terminal

If boot-time TRIM timeout cannot be changed / set as of macOS 12.0, do the values only apply to Big Sur and earlier?
Apparently

Will any number other than 0 will essentially just turn on boot-time TRIM, with the actual value disregarded by Monterey?
Could well be. Since you notice a difference, setting a value may just flick it on for Monterey/Newer.
 
CustomMemory to true ,Please Advice Macpro 2010 running 64 ram with martin Package, all function working
properly ,shows slow performance issues on illustrator, as per AMD acceleration page mention CustomMemory set to True ,it should change this setting for full Ram Performance.please Advice .
 

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CustomMemory to true ,Please Advice Macpro 2010 running 64 ram with martin Package, all function working
properly ,shows slow performance issues on illustrator, as per AMD acceleration page mention CustomMemory set to True ,it should change this setting for full Ram Performance.please Advice .
Are you using 32GB DIMM?
 
CustomMemory to true ,Please Advice Macpro 2010 running 64 ram with martin Package, all function working
properly ,shows slow performance issues on illustrator, as per AMD acceleration page mention CustomMemory set to True ,it should change this setting for full Ram Performance.please Advice .
From your picture I can see you have either a E5530 or E5620 CPU. The max RAM speed those CPU's can handle is 1066MHz. The only way to get it up to full speed of 1333MHz is to upgrade the CPU

See more info on CPU upgrades here: https://forums.macrumors.com/threads/mac-pro-cpu-compatibility-list.1954766/
 
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Is this still the case with 0.8.7? "For PULSE RX580, users reported that only can see boot screen when boot from gaming mode. There may be no UEFI GOP in the compute mode's ROM."

I have a Sapphire Pulse RX580 4GB DDR5 with the latest OC installed using your package (thanks for making it easy). I get black screen until login. I have an install usb configured to Install Windows but cannot see it on a restart using the Option key. I am looking to install windows to flash the BIOS on the used RX580 I bought to ensure I am on the correct unmodified version. Assuming the black screen is only seen in gaming mode as noted. I would like to set up the card but my research says only Windows tools exist for this so I am back at the start. Does anyone have suggestions for flashing the GPU card or getting the Mac to boot in windows off the USB?

Mac Pro 4,1 flashed to 5,1
2 x 3.33 GHz 6-Core Intel Xeon
64 GB 1333 MHz DDR3
RX 580 4gb gddr5 dual PN 299-4E353-110SA
 
Gaming is the valid gop mode for a RX580.

Computing is invalid gop, no gop boot screen.
Thank you. I understand that from Martin's notes. The real issue is there a mac tool to flash the gpu rom with correct bios. My card has no physical switch. Or, is there a way to install and boot Windows to access all the gpu tools when the option key on startup route is not available due black screen;. Once in windows I can set the card for gaming
 
If you have an UEFI Windows running then you shouldnt run in without OpenCore or you will infect your bootrom with certificates (everyone should have a backup of the bootroom, btw.)

You can flash the GPU on a real PC, on a Mac Pro with legacy Windows or with Dos. The 2nd two should boot if they are the only bootable OS in the Mac.
 
I downloaded the Windows version as posted in the OpenCore on the Mac thread and set up the USB as instructed so I would assume it is a UEFI version since I can't run it, I can't run the "msinfo32". Can I install Legacy WIndows on an OC Mac Pro 5,1 Monterey or use another machine? Asking because I only have the one desktop and an M1 MacBook Pro
 
I downloaded the Windows version as posted in the OpenCore on the Mac thread and set up the USB as instructed so I would assume it is a UEFI version since I can't run it, I can't run the "msinfo32". Can I install Legacy WIndows on an OC Mac Pro 5,1 Monterey or use another machine? Asking because I only have the one desktop and an M1 MacBook Pro
You can simply check the hard drive's partition pattern to determine if Windows was installed in UEFI or legacy mode. Open Terminal and enter diskutil list.

For UEFI Windows, it should looks like this. For legacy, it should has less partitions.
Screenshot 2022-12-16 at 8.01.40.png


You can simply burn a Windows installation disc, hold C to boot, then install Windows to run the ATIWinFlash tool. This way will install the legacy Windows.

Or, you can simply run FreeDOS, Linux in Live mode, then there is no need to install the OS, but just run it from a USB thumb drive / CD, and use ATIFlash (for DOS), or amdvbflash (Linux) to flash the GPU.
 
Good day,
I would like to completely reinstall Big Sur 11.7.2.
Should I upgrade to 0.8.7 first, or is 0.8.0 better for Big Sur.
Many Thanks
Max
 
There's so much available in this thread on enabling hardware acceleration, that finding just the right piece for one particular system configuration can be a challenge. I'm not happy about adding to the clutter, but what else is there to do? (Tell me if you know a better route than just posting here.)

My Mac Pro running Catalina (10.15.7) has a flashed (not by me) AMD Radeon R9 280x 3 GB. I get the impression that with the right config.plist settings, hardware acceleration should be possible. Is this true?

I have everything else about OpenCore working, following Martin Lo's 0.8.6 release and guidelines including hardware acceleratioin, but I don't seem to have hardware acceleration. Since that didn't work, I've been trying to follow the appropriate bits of the advice from the general OpenCore thread as to how the properties affecting hardware acceleration should be set.

So the config.plist that's attached is not straight from Martin Lo's release, but just the latest thing I tried.

What do I need to change?
 

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My Mac Pro running Catalina (10.15.7) has a flashed (not by me) AMD Radeon R9 280x 3 GB. I get the impression that with the right config.plist settings, hardware acceleration should be possible. Is this true?
False, AMD hardware assistance via Apple VideoToolbox API starts with AMD Polaris GPUs (RX 460 and newer GPUs).

R9 280 = HD 7950 = too old and barely supports H.264 acceleration when running Windows. If was possible to a Tahiti GPU to have it, MacPro6,1 would have it working, no?
 
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If was possible to a Tahiti GPU to have it, MacPro6,1 would have it working, no?
I certainly appreciate your response, Alex, and your helping me with my boot ROM a few months back. But 😁 I don’t know much about GPUs, especially details like these. Thanks again!

I don’t really need to worry about hardware acceleration. I don’t do anything that truly needs it.

Nevertheless, I got this card rather cheap over a year ago so that I could meet minimum requirements for Mojave. If something better turns up at a good price, I’ll think about upgrading.
 
You can simply check the hard drive's partition pattern to determine if Windows was installed in UEFI or legacy mode. Open Terminal and enter diskutil list.

For UEFI Windows, it should looks like this. For legacy, it should has less partitions.
View attachment 2128945

You can simply burn a Windows installation disc, hold C to boot, then install Windows to run the ATIWinFlash tool. This way will install the legacy Windows.

Or, you can simply run FreeDOS, Linux in Live mode, then there is no need to install the OS, but just run it from a USB thumb drive / CD, and use ATIFlash (for DOS), or amdvbflash (Linux) to flash the GPU.
So I'm back after several days of trying to install windows or FreeDos without booting to run via a USB device. I tried Parallels VM. It installs WIndows perfectly but it does not allow access to the Radeon GPU. Boot camp appears to require the boot screen which is unaccessible with the black screen condition. I tried installing of an WIndows ISO DVD and installed to an internal drive. It won't boot from there and the ISO only does the install. Any suggestions greatly appreciated. I must be missing a step somewhere in the processes
 
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