Fyi, thanks to @Santa's Little Helper we now have a working m4000m vbios with GOP allowing for boot screen under rEFInd and OpenCore!
M4000M with GOP
M4000M with GOP
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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Yeah, I screwed that one up when I let OCLP patch my thumb drive with the backup rom on it.
You should be able to download it from techpowerup.com
the rom for my specific card is up there. At least I had written down the subsystem ID…
Does yours also take like 40 seconds when initializing the windows driver?
Tried PRAM reset several times, same issue. I still get the circle with line through it, at about 1/3 of the progress bar.
Is this the race condition bug I read about? Do I just need to keep booting back into the installer several times to get it to work? I don't think so because I haven't even started the installation, just trying to get into the installer.
My High Sierra is installed in an APFS volume. Could that be the issue? I would think I should still be able to get into the installer though.
I'm able to launch the Big Sur Installer GUI from inside High Sierra, and when I choose an APFS volume it says I need a firmware update. OCLP docs say that means I need to set SMBIOS mode to Moderate. So I rebuilt my OC with that setting and tried to boot into the Big Sur Installer again and still same problem. Doing a PRAM reset every time.
I am using the OCLP terminal UI to build and install it.
Not entirely clear to me what your problem and your current plan is. So it would be really nice to have a:
Where I am? Where would I like to go? What is my planned path to achieve this?
Do you want to OTA upgrade an existing High Sierra installation to Big Sur? Or do you try to start an Big Sur installer application from the running High Sierra to install into another APFS partition?
1. Never share the same APFS container for High Sierra and Big Sur!
2. Try to create an USB installer (USB stick or USB disk) to install Big Sur, this way you do not need to use moderate spoofing in the middle of the process. Moderate spoofing is needed to install Mojave and Catalina, but not to run it.
3. Try to install OCLP on your single internal SSD (makes it faster and more reliable to use).
4. On the long run get rid of High Sierra if you can. Booting into HS overwrites some parts of the Big Sur preboot partition and makes it unbootable - you would need to disable SecureBootModel to get it working, again.
5. The OCLP docs always writes about using an USB installer - there is a complete section about this. Do not use short cuts.
6. When you successfully started the Big Sur (Monterey) installer use the internal new disk utility to delete (aka re-create) the target AFPS partition/container. You may share an APFS using multiply container between several Big Sur and Monterey installations.
Only pre 2011 systems suffer of the race-condition named problem so far.
I would like to move from High Sierra to Big Sur and have a blank installation of High Sierra so I can still use target display mode or for emergencies. Right now I'm just trying to see if I can get Big Sur working on my machine. If it does work then I will transfer all of my files and apps to it and remove the High Sierra APFS volume and reinstall High Sierra in a HFS+ partition.
I am using an external USB drive for the installer. I also have installers for High Sierra and Mojave on the same drive in separate partitions. The external drive also has the OCLP EFI partition on it.
I'm hesitant to install OCLP on my internal drive until I can verify that Big Sur works. I still want to use High Sierra in case it doesn't work.
So far I can't even get into the Big Sur installer. Thanks for the help. Maybe I should ask in the OCLP forum.
Having an EFI Boot screen you always can force a PRAM reset on boot, press option after the second chime and finally select the High Sierra partition directly without using OpenCore.
The complete SD story has only been created to give the AMD users a chance to survive a bad OC installation somehow. Using an OC Recovery CD makes even this superfluous. I have all the SD cards lying unused on the desk these days.
OCLP will (being used) disable the iGPU, so you will loose some functionality like AirPlay. Unfortunately I could only bring back the HD3000 and Airplay with the old ATI GPU on Big Sur but not using an Nvidia Metal GPU - it would have needed root volume patching. Another project....
Big Sur will work, there is no doubt about it. When booting OC the first time press CRTL on select to make it the default boot choice. Otherwise you will need to sit in front of the keyboard all night long to boot through OC every time by hand.
The Big Sur installer it is a stock one, right?
Ok, that makes sense. Thanks for the info. I don't need Airplay, just want to keep target display mode if I can.
The actual problem I'm having is I think something is wrong with my K2100M. I get random kernel panics in Mojave, while High Sierra is completely stable, but sometimes randomly the entire menu bar or some menu bar icons will turn completely black for a few seconds before fixing itself. I'm guessing there is some bad video memory or something. I am totally fine with this, but I wanted to see whether Big Sur would also kernel panic, or whether I need to buy another K2100M.
I got the Big Sur installer from the python script on this page: https://dortania.github.io/OpenCore-Legacy-Patcher/INSTALLER.html#downloading, and then I ran the createinstallmedia command. It's Big Sur 11.5.2.
Hello,
I am new to the forum, but have been reading for awhile. I was given a 2010 27 inc Imac and upgraded the CPU to the i7-870, HDD to SSD and recently replaced my HD 5670 with a 5750 which doubled my Unigen score.
I had found someone selling a GTX 770m on facebook, but they refunded me with no explanation. I also recently noticed a 4GB HP PCA Radeon Pro Wx 4150 L17822 001 L17822001 being sold by Virventures.com through facebook. Has anyone ever bought from them before? Sourcing a good card seems to be the crux of this upgrade.
I am new to the forum, but have been reading for awhile. I was given a 2010 27 inc Imac and upgraded the CPU to the i7-870, HDD to SSD and recently replaced my HD 5670 with a 5750 which doubled my Unigen score.
I had found someone selling a GTX 770m on facebook, but they refunded me with no explanation. I also recently noticed a 4GB HP PCA Radeon Pro Wx 4150 L17822 001 L17822001 being sold by Virventures.com through facebook. Has anyone ever bought from them before? Sourcing a good card seems to be the crux of this upgrade.
Hello! Apologies if I'm being dumb, but why is the Nvidia GTX 675MX not listed as a working card in the first post? I am considering buying a pre-flashed one from Nick [D]vB on eBay and I'm curious about the performance vs other options. Thanks in advance!
Did you check which memory the K2100M has and did you flash the correct vBIOS version?
This special card will work perfectly and it will perform exactly as good as the K3100M.
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It’s not listed because only cards with free community accompanying vroms are uploaded so users here have an as OEM experience as possible.
Nick used to upload roms here but now uses his talents for his own business and rightly so.
Aha, thanks for the information. I'd be interested if anyone has any links to benchmarks for the 675MX 4GB in a 2011 27", I'd love to see them.
So I found the solution. And yes pretty sure I have the SKhynix memory with ROM #1.
I went to try installing Big Sur on my MacBook Pro 7,1 and I thought surely this will work, but same exact problem getting into the installer. Then I realized, I'm actually using an external FIREWIRE drive! Could that be the issue? YES! If I simply plug it in with a USB cable then I can load the installer.
Wow. So, maybe someone should document that. Installer works with USB drive, not FireWire.
Thanks for your help @Ausdauersportler
Firewire boot is broken or unsupported since
There is no need to document something what is already well known to the public.
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In principle all MXM cards can run somehow in these iMacs. But this card is rated with 100W and needs surely a modified vBIOS to avoid over heating on load and more importantly there has been no other user testing this card before and it is unclear if you will face problems like we had/experience with other AMD cards, i.e.:
- card does not POST in all or some iMacs (most problematic one is always the Mid 2011)
- broken sleep/wake
- does not work with the internal LCD connected
- does not initialize properly after reboot
So we all would appreciate if you check it out and let us know what happens. Surely it would need some time and experience with tools like OC. Installing this card would need a 2011 three pipe heat sink and possible some grinding, too. (just an assumption). macOS driver support should exist unlike for newer post Kepler Nvidia cards. You need a 27“ model!
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I suggest mentioning it in the first post in the OCLP instructions. I've been reading this thread for several years and I didn't know that.
I've been using the FireWire drive successfully to install and update Mojave on my MacBook Pro 7,1 for a few years, so I don't know what you mean. Installing Big Sur is the first time it's been a problem for me.
Replace Mojave with Catalina. FireWire boot has been disabled by Apple with Catalina. Sorry about the confusion.
We cannot have a second list managed on our own of all the changes Apple introduces with new macOS versions. Although copying data on the internet does not cost a lot it is an ridiculous approach. It has to be managed at the site with the copy and it takes limited space (at least in this forum).
We have these search machines…
Hi guys)
I have second iMac 27 2009, with the original video card, it is connected by a cable on pass to port, when pressing a cmd f2 the black screen, Prompt how to connect the target display or how to make friends with my other iMac with the video card GTX880 the system Catalina is installed?
Still I noticed that the iMac GTX880 display is a little more dim on
I have second iMac 27 2009, with the original video card, it is connected by a cable on pass to port, when pressing a cmd f2 the black screen, Prompt how to connect the target display or how to make friends with my other iMac with the video card GTX880 the system Catalina is installed?
Still I noticed that the iMac GTX880 display is a little more dim on
I just bought a K4100M, as you can see in my signature. I am stoked about installing the three parts I just bought to my iMac and hope I don't botch the software work. Wish me luck, folks. I have upgraded the other stuff and have now torn down and reassembled my iMac like five times, so this ought not to be that difficult or mysterious. I will be here bugging you all for help once I start with the patching and such.
One question, though: Is OCLP (or some other bootloader) truly necessary once the vBIOS has been flashed? If it is flashed it seems to my ignorant musician brain that this would make it a "Mac GPU" that is ready to go. I understand that this is not the case, but keeping a USB stick hanging out of the back of my machine is not good as I have three cats. Three very curious cats. Need I say more about that? (heh, heh, heh…) Curtis Gross posted how to configure OC to autoload, and someone in the comments stated that a small (like 200MB) partition could be installed to the boot drive and the contents of the thumb drive copied over to that, and then listing it as the boot drive from that point on.
So, copy the Linux thumb drive to a very small partition, bless that partition, and list it as the boot drive, then configure it all to autoload on boot. Does this sound like I understood the process well enough to try that, once the machine is up and running and I am happy with it? And I can't believe we still have to bless stuff. I remember having to do that back in Macintosh System Software 6.0.8 in the late 1980s…
I have learned a ton in the time I have been lurking here. I hope to become more active in the GPU, CPU, and OCLP threads, as well as the rest of the community over time. I like learning, I love computers, and you people seem to have a lot to teach me.
I just hope my components don't arrive DOA! ;-)
One question, though: Is OCLP (or some other bootloader) truly necessary once the vBIOS has been flashed? If it is flashed it seems to my ignorant musician brain that this would make it a "Mac GPU" that is ready to go. I understand that this is not the case, but keeping a USB stick hanging out of the back of my machine is not good as I have three cats. Three very curious cats. Need I say more about that? (heh, heh, heh…) Curtis Gross posted how to configure OC to autoload, and someone in the comments stated that a small (like 200MB) partition could be installed to the boot drive and the contents of the thumb drive copied over to that, and then listing it as the boot drive from that point on.
So, copy the Linux thumb drive to a very small partition, bless that partition, and list it as the boot drive, then configure it all to autoload on boot. Does this sound like I understood the process well enough to try that, once the machine is up and running and I am happy with it? And I can't believe we still have to bless stuff. I remember having to do that back in Macintosh System Software 6.0.8 in the late 1980s…
I have learned a ton in the time I have been lurking here. I hope to become more active in the GPU, CPU, and OCLP threads, as well as the rest of the community over time. I like learning, I love computers, and you people seem to have a lot to teach me.
I just hope my components don't arrive DOA! ;-)