BTW, the OC seems to run in full brightness. Although it is of short duration, but very irritating to eyes. I can't seem to find any setting to dim it down in the OC documents ... or make it a dark background ...
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
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Go back to the first posts and search the announcements of the BIOS versions for the K610M, K1100M, K2100M - all ofg these NEED opencore to enable brightness control. It is not a genuine feature of opencore, it is one of the config files provided here.
What I mean is that the background of the OC BootPicker screen runs in full brightness. I cannot find the information in OC documents to adjust that nor in OpenCore Configurator. The Config.plist has a section on backlight-control under DeviceProperties but I don't know how to change that or whether that is the place to dim the light at the first Boot Picker screen or even turn it into black background.
Exactly. I know Open Core has its awesome function and is at the heart of this thread. But with M1 Macs having instant on that's faster than any Macs before them*, I don't feel like having to select between macOS and Bootcamp every time I turn this machine on, especially when 860M & Mojave supports native brightness control without Open Core.
*Never have I heard anyone complaining that Macs are slow to wake from sleep, but Apple sped that up even more still.
When I did PRAM resets while trying different versions of Open Core (0.6.3, .4, & .5), I had to grab and put my sunglasses on
Chic. Beach Vibe.
Bonsoir,
About the PRAM reset, by default it boots on the SD memory card?
I ask this question because I still don't understand why my SD memory card (About this Mac say: Cet ordinateur ne possède par de lecteur de carte mémoire interne Apple.) work anymore and I had to install OpenCore directly on my SSD, otherwise it would boot directly on the SSD (without OC the machine would shut down) and not on my USB Key.
PS: I wanted to test ASD Dual Boot 3S145A EFI without success.
My ethernet card also not working + full fanning a few seconds after booting fixed by Macs Fan Control after booting.
Tested with and without my EFI Mod.
About the PRAM reset, by default it boots on the SD memory card?
I ask this question because I still don't understand why my SD memory card (About this Mac say: Cet ordinateur ne possède par de lecteur de carte mémoire interne Apple.) work anymore and I had to install OpenCore directly on my SSD, otherwise it would boot directly on the SSD (without OC the machine would shut down) and not on my USB Key.
PS: I wanted to test ASD Dual Boot 3S145A EFI without success.
My ethernet card also not working + full fanning a few seconds after booting fixed by Macs Fan Control after booting.
Tested with and without my EFI Mod.
°°
Did you download and read the apple technician guides linked from the hardware posts? Hardware cannot be repaired by posting and patching.
OpenCore internally on the first boot disk is dangerous. If it is not working you need to open the the system. Place it on your second disk or on an partitions with number bigger that 1. Place High Sierra on partition 0 of your first disk. This will boot in any case. There is a PC BIOS in the iMacs and possibly one could change the boot order there. But I have only once seen this PC BIOS when flashing a virgin firmware to an iMac.
Do three PRAM resets in a row and a SMC reset to revive your hardware. If the components do not come back (SD card and ethernet) running High Sierra (check About this Mac -> System report etc) than it is broken. Sometime the SMC goes south and cannot really initialize the installed hardware, but this procedure should fix it.
Did you download and read the apple technician guides linked from the hardware posts? Hardware cannot be repaired by posting and patching.
OpenCore internally on the first boot disk is dangerous. If it is not working you need to open the the system. Place it on your second disk or on an partitions with number bigger that 1. Place High Sierra on partition 0 of your first disk. This will boot in any case. There is a PC BIOS in the iMacs and possibly one could change the boot order there. But I have only once seen this PC BIOS when flashing a virgin firmware to an iMac.
Hello everybody. Can anyone help me with advice? I read the forum for two nights and did not find a solution to the problem (or didn't understand).
iMac 2011 gpu-hd6970m SSD-OS and SSD-Windows (installation usb). In Windows no sound. Сan i fix this error so as not to reinstall windows with CD?
Thank you.
iMac 2011 gpu-hd6970m SSD-OS and SSD-Windows (installation usb). In Windows no sound. Сan i fix this error so as not to reinstall windows with CD?
Thank you.
Well, I finally got my Xeon E3-1240 and Quadro m4000m installed... Some good and bad. I can VPN in using TeamViewer and see windows running @ 640x480. I can see the M4000M card in HWinfo64, and the CPU is also recognized correctly other than full fan speed. Windows will not install any driver for the m4000m, and I am not getting display on the internal screen or over DisplayPort. I am wondering if the issue is that it is a UEFI card and in order to properly run Windows I installed as bios. I am afraid to convert and lose my install that was working properly with my 6770m card, but I'm not sure how to install Windows on a new drive without video.
Just flashed the original rom back onto my uncooperative k1100m. Prior to that, did the pram reset 3x trick after pulling the video card without any luck (still just 2 diagnostic LEDs lit). With card in pram reset wasn’t helpful either.
I realized that my k1100m has Elpida memory on it, and also that Nick released a k2100m with Elpida support. Could this be my problem, no support for Elpida in the modified k1100m rom?
The Elpida memory chip is W2032BBBG 6A-F on my board.
Putting down your system config in your Signature would help others help you
But this is NOT the forum for troubleshooting Windows installation for iMac as you have a stock ATI GPU.
Anyway, you need to read the 1st post completely multiple times before you can find your solution. It is so condense in information that important points would easily missed or dismissed during your reading. I don't think anyone can read thru this forum thread of >12000 messages in 2 nights.
In 1st post concerning Installing OpenCore on your iMac is your solution.
The manual procedure is described by Pascal here:
2011 iMac Graphics Card Upgrade
How to patch DSDT to make sound work in Windows10 UEFI To make sound work in Bootcamp Windows UEFI, you could need to patch DSDT. We have to remove Window's 32-bit PCIe allocation constraint and allow the use of a 64-bit PCIe address space. You need Maciasl to extract your own DSDT. Search...
forums.macrumors.com
Why would you still want to struggle with a K4000m when it is clearly listed in the 1st post with no good mac vBIOS currently ? Otherwise, you have to wait until the vBIOS is done, but no one knows when that will be done, if ever.
Oh, I see.
Then this may not be the adequate forum for the discussion of Windows installation in unsupported GPU with PC vBIOS
If you have Winclone first make a backup image of Windows 10. You could then try making it EFI bootable (there's an option for this in Winclone) and booting into Windows 10 UEFI using OpenCore. With OpenCore you can load a DSDT patch to fix the audio. Alternatively you can disable test signing mode and load the DSDT patch within Windows.
What you probably should have done (if your 6770M was working) was to make a Winclone image, run a sysprep and make another image saved with a different filename so you can tell the images apart. With hardware changes a sysprep may be necessary to get things working properly.
Any ideas why on my 21.5 2011 iMac (with Nick's BIOS on a K1100M) it needs to have the PRAM reset every single time I boot up in order to show a picture? I also get random reboots, and very forced & sudden reboots when trying to install anything from the App Store.
Using dosdudes Catalina method as well.
Using dosdudes Catalina method as well.
Bonjour,
Thank you for your answer,
1. Reset PRAM and SMC performed without further success, I also have my original sound card faulty, so if no recovery of this problem, I would change my motherboard again, in the meantime for the ethernet network I would take a thunderbolt card if not too expensive.
2. Yes but quickly I admit it, I wanted to do a hardware test, I would try with the 10.6.3 version rather than the simple EFI version (ASD Dual Boot 3S145A).
3. Yes it's even you who advised me against it the first time, that's why I asked if it was the SD card reader that was the default after a reset, I'll see later for your other solution.
In spite of that, I'm delighted, it's really nice this new card.
Edit: by the way I still don't know what brand it is, Blue PCB without writing (or tattoo?) Dell or HP.
Bonne journée.
Edit: SD card reader, twisted internal connector, rectified, it's working again, I'm leaning towards a problem with my EFI Mod regarding the Ethernet card.
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Hi,
I have never posted before but I had the same problem as you for many months until I found this video. I think it is what the other person who replied to you said but in video. I ignored the first bit as like you I had windows installed and the last bit as he was making custom boot loading things (not quite sure). From about 35min to about 50min in the video he fixes the sound. I have no idea if this is a good or bad method but I can confirm it worked for me. I have iMac 2011 21.5inch gpu-hd6770m SSD-macos and HDD-Windows10. I hope this helps.
We have already a working solution documented in the OpenCore section of the post #1 for this known problem and please search this forum for the fitting thread, last time I checked the name it was still 2011 iMac Graphics Card Upgrade ...
Please check the first post for macOS installation instructions (Catalina) and the use of OpenCore for you iMac 2011 and the K1100M.
Guys! I am so close and I know you can help me get it working. I was able to get my m4000m up and running on an external display in Windows 10. It was an HP card but after using TeamViewer to vpn in and flashing a Dell vbios Windows did its thing and installed the drivers and my external display started working. I read something before about directing the video to the internal display in the vrom, but I'm not sure how to do that. Do I have to mod the vbios or something? I know this is not really a Windows forum, but I am putting an unsupported GPU in a 2011 iMac 27 and will do a write-up after it is complete!
Edit: added photos
Edit: added photos
Interestingly enough it seems to recognize the monitor in Device Manager as a Generic PnP Monitor and Nvidia Control Panel sees it as Apple iMac...
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Go to the first post and read the OpenCore sections. Create a Catalina Loader on SD card it USB stick with the normal Nvidia config list activated and select in your bootcamp tools the SD card or USB device as start object. If you get lucky your internal LCD switches on on boot from this Catalina Loader. It presents on top an additional emulated boot screen feature.
At least this works for all Nvidia cards listed on post #1.
If not we are out of options.
(please read the first post)
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