Good news, it means we can switch screens between 2009,2010, and 2011 27''.
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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that's right. Switching the frame is a patience part tough. 4 screws no problem, but also a lot of sticky double side tape/glue you have to cut loose. But it works great now!
Led 4 is lit when your internal lcd is connected and working so that is normal.
And yes as @herrdude said, and as I suspected, your 780m is defective.
You could try to disassemble clean it up and reapply quality thermal paste or bake it but the card IMO is on the way out.
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As long as everything work, that's of no concern. In fact, the beauty of OCLP is that you can re-enable SIP for intended system security and running FileVault.
But it would be a waste to have RX480 running just HS. The next step is to install Big Sur to another SSD. And make sure on PRAM reset, the default boot device is the HS partition/drive to ease latter troubleshooting if needed.
You could try booting to linux and disabling the dedicated GPU.
MacBook Pro: How to disable discrete GPU permanently from EFI?
I'd like to disable the NVidia GTX 750M GPU on my MacBook Pro 15" (Retina, Mid 2014, Mac OS X 10.10 Yosemite). I know I can use GfxCardStatus but I read I could have a more permanent solution by
Hi can someone help please just installed opencore legacy patcher big sur on IMac mid 2011 everything works good but if I wanna use messenger or what's app or other apps that need camera or microphone access it won't let me do it. The apps don't show up in privacy.
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So a M6100 works "out of the box"? What happened since then?
Edit: So I bought a FirePro M6100 for only 40 USD with 10-Day shipping (is it allowed to write prices down?). The K4100M or K5000M costs around 150 USD, so much cheaper. And the performance should be the same (but with 2GB RAM). "Thanks to the very high clock rates of up to 1,100 MHz for the chip and 1,500 MHz for the memory (6,000 MHz effective, 96 GB/s), the 3D gaming performance is slightly above the Nvidia Quadro K4100M or GeForce GTX 860M." (https://www.notebookcheck.com/AMD-FirePro-M6100.104721.0.html).
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I've always wanted to try a 21.5" (09/10) LVDS cable to test this on a 27" 2009-2010 lcd to 2011 logic board without any disassembly or swapping boards.
Don't know if it would be long enough though.
Many thanks for your advices.
I will create a new partition on my SSD where Big Sur will be installed. Currently the EFI of OCLP 01.1 is on a Catalina Loader SD card, should we stay in this state?
Regarding the active mini-display adapter/dongle, does it avoid connecting an external screen? is it this type of dongle ? Mini-DisplayPort-Thunderbolt-Adapter .
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For AMD GPUs, it is better to have the OCLP on an SD card for easier trouble-shooting and update of the OCLP.
ALWAYS keep a HS partition on your default boot drive, i.e. the first partition on your drive that your iMac will boot on default upon PRAM reset. If there is anything wrong with the new OS, you can always boot back to HS (natively supported) to work for a solution without a black screen.
Just use a dummy active connector for the external mini-Display port. I use this:
FUERAN Mini DP - DisplayPort Display Emulator EDID Emulator Plug (fit Headless 2560x1600@60Hz) Display Port Dummy Plug (Mini dp 1P)
Note: Why can't Mini DP display the highest resolution? 1. Mini DP depends on whether it is a discrete graphics card or an integrated graphics card. The integrated graphics card has poor compatibility and cannot reach the highest resolution, The independent graphics card has strong compatibility ...
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Hello!!! I have a 2009 27" iMac with Core 2 Duo 3.06 GHz and ATI Radeon HD4850.
1) I am planning to upgrade the whole motherboard for an Intel Core i7-860.
2) I am planning to upgrade to an SSD.
3) I am planning to upgrade to 16GB RAM.
4) I would have an iMac 2009 27" with Core i7 at this point, so...
Can I use Dosdude1's macOS Catalina Patcher to upgrade to Catalina and then, use Patched Sur to upgrade to Big Sur? I know it would be terrible because of the fact that Accelerated Graphics will be disabled, but can I upgrade to a Metal GPU for the iMac 2009 to fix that and hopefully get Big Sur? And lastly, the most important question:
What Graphics Card, compatible with this iMac would be compatible? But even more important, which would have no boot screen issues, brightness issues and would be as cheap as possible?
1) I am planning to upgrade the whole motherboard for an Intel Core i7-860.
2) I am planning to upgrade to an SSD.
3) I am planning to upgrade to 16GB RAM.
4) I would have an iMac 2009 27" with Core i7 at this point, so...
Can I use Dosdude1's macOS Catalina Patcher to upgrade to Catalina and then, use Patched Sur to upgrade to Big Sur? I know it would be terrible because of the fact that Accelerated Graphics will be disabled, but can I upgrade to a Metal GPU for the iMac 2009 to fix that and hopefully get Big Sur? And lastly, the most important question:
What Graphics Card, compatible with this iMac would be compatible? But even more important, which would have no boot screen issues, brightness issues and would be as cheap as possible?
Read the first post on the first page of this thread and please do not shoot the messenger - your system is currently not really supported. Using another board with an i7 will work, not sure if it will be cheaper to start with a gpu dead i7 model.
Edit:
Since we have OLCP no one here needs to use any longer @dosdude1 or Patched Sur after the metal upgrade. Using OCLP makes these (under the hood of OpenCore) undistinguable from a fully supported system. You will find the update options with OCLP on the first post, too.
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Did you read post one in this thread? Table of Working NVIDIA cards spoiler?
Obviously not.
Next time make some more pictures and describe the process, this is a real nice finding! Would love to add it to the first post.
Have fun!
Just ordered the cheapest upgrade I could find for my Late 2011 21.5" - a K610M from Aliexpress 'imac version'... let's see what turns up 
Not too fussed about ultimate performance, just want something a bit more responsive than the 256MB HD6750 so I can run Catalina or Big Sur. Looking forward in a strange way to some blind BIOS flashing haha
Not too fussed about ultimate performance, just want something a bit more responsive than the 256MB HD6750 so I can run Catalina or Big Sur. Looking forward in a strange way to some blind BIOS flashing haha
Not that blind. You will use SSH from another computer.Just ordered the cheapest upgrade I could find for my Late 2011 21.5" - a K610M from Aliexpress 'imac version'... let's see what turns up
Chances are if you bought the card labelled as "iMac Version" that it will come pre flashed.Just ordered the cheapest upgrade I could find for my Late 2011 21.5" - a K610M from Aliexpress 'imac version'... let's see what turns up
Chuck it in and if you get boot screen you know its flashed already.
Hi guys... I have been using Patched Sur since 11.0.1 until now (Im in 11.2.3) in my mid 2011 27inch imac with NVIDIA K3100M, but I will now dive into the OCLP greatness. 2 Things drove me this path; OTA and Security. I am now building the bootable installer. Wish me luck brothers!
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Just want to share my own experience with OCLP that converted my dosdude patch to OCLP.
I hit this exact same error when preparing the USB stick for the actual iMac12,2 on my PC hackintosh.
In the end, I went to the actual iMac12,2 running Catalina using dosdude's patch to run OCLP Patcher to build the Opencore. It went through without any error. I was able to get the EFI part installed nicely to the USB stick (with Big Sur). I then boot up my iMac12,2 with the USB stick to install Big Sur without any problem.
No black screen, no nothing.
All went well.
OCLP has included a hardware detection. It assumes to run on native Apple legacy hardware. If you fool the app on an hackintosh or sometimes even on a real Apple system using OpenCore (and hiding it’s real nature) this detection can fail. Using the CLI or setting all parameters according to the target hardware should always work, i.e. you can run it on an iMac11,1 to generate a iMac12,2 configuration and vice versa.
Bonjour à tous,
J'ai un Imac 27 "2009 avec un processeur Core 2 duo d'origine.
J'ai changé la carte mère pour un processeur I7.
La carte est fonctionnelle!
J'ai acheté une carte graphique K4100 pour la mise à niveau, normalement cette carte devrait fonctionner.
Mon problème est, que j'ai un écran noir lorsque je l'allume et qu'il reste noir. Les ventilateurs fonctionnent mais je n'ai aucun son au démarrage et aucune combinaison de touches ne fonctionne.
Avez-vous une idée de mon problème?
J'ai un Imac 27 "2009 avec un processeur Core 2 duo d'origine.
J'ai changé la carte mère pour un processeur I7.
La carte est fonctionnelle!
J'ai acheté une carte graphique K4100 pour la mise à niveau, normalement cette carte devrait fonctionner.
Mon problème est, que j'ai un écran noir lorsque je l'allume et qu'il reste noir. Les ventilateurs fonctionnent mais je n'ai aucun son au démarrage et aucune combinaison de touches ne fonctionne.
Avez-vous une idée de mon problème?
Did your read the first post in this thread?
Did you flash your K4100m?
Did you read about the known hardware problems in post 1?
Ceci est un forum anglophone
Did you flash your card with the new, correct firmware?
Did you flash your card with the new, correct firmware?