Do I understand correctly that you installed a new video card and now you don’t see the imac internal display? Check if there is an image on the external display. I have a problem installing 780m in imac 27 2011, the internal display does not work. The external display shows OS 10.15.4 and 10.13.6 and boot screens. as if imac had turned into a mac mini. @Ausdauersportler and @highvoltage12v tried to help me with AppleGraphicsControl.kext, but no results yet
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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Hi I couldnt see the modded vbios. Can someone re-attach or send this to me please? Many thanks!
Hardware backlight mode and bootrom mod. Bootrom mod always present, i didn't removed it.Thanks Sharpino89, that is great insight and yet another confirmation of the previous findings from the last several months. @NOTlNICE I think there are only 5 or 6 successful installs: Nick, Pascal, wlagarde, ooze, LegoNickD. One thing I believe is common about previous implementations is that most of them if not all made the backlight mod during the first implementation and did it last autumn (so perhaps some patch made it more difficult now?!?although it does not sound too logical when I put it like that)..
although it does not sound too logical when I put it like that)..
I made the internal display to work, it was a faulty connector. But the problem with the ongoing reboot is still here. What should I do?! It loades the apple at the middle, and reboots.
Is it possible to test (and flash) large MXM cards too (case opened) with a HP elite 8200 USDT?
Hi. I've successfully installed 770m to my 27 iMac 2011 then flashed vBIOS with Nick [D]vB beta 3 rom. Both high sierra and bootcamp win 10 worked great, idle temperature is ~50 for the heatsink and ~55 for the PECI. After that I've decided to install Catalina (the reason I did an upgrade) with the dosdude1 patcher. I didn't uncheck "Auto-Apply Post-Install Patches" option because the OP says that it doesn't necessary for my 12,2 iMac. The installment process was passing with the blank screen and I think that's because of 10.15.4 version that's currently installing with the patcher (latest version from the apple servers). After the install process i've managed to successfully boot to 10.15.4 with the screen working from boot menu (holding the alt key). Now i'm trying to install the AppleGraphicControl.kext with the Hackintool utility as described here and I think that everything worked as expected - the process ended up with an error (screenshot attached) and the kext file has been copied to the /l/e/ folder. After that i've opened the terminal and executed "sudo reboot" command but it seems that nothing changed because if the system boots in normal way the screen is still black and I can make it work only if I'm using the boot menu. So the question is what I'm doing wrong or maybe I need another kext file to be added? What exactly I'm doing:
1. Open Hackintool
2. Switch to the "Utilities tab"
3. Press the small "house" button on the bottom that says "Disable gatekeeper and mount the disk in read/write mode"
4. Confirm it with the login password
5. Press the button next to the "house" button that says "install kext(s)"
6. Select the AppleGraphicControl.kext and press "Select"
7. On the next opened window showing /l/e/ folder press the "select destination" button
8. Wait the process to be finished with an install/timeout error
9. Open terminal and execute "sudo reboot"
10. Enter the login password and press enter
11. Wait system to reboot
Thank you for any provided help.
1. Open Hackintool
2. Switch to the "Utilities tab"
3. Press the small "house" button on the bottom that says "Disable gatekeeper and mount the disk in read/write mode"
4. Confirm it with the login password
5. Press the button next to the "house" button that says "install kext(s)"
6. Select the AppleGraphicControl.kext and press "Select"
7. On the next opened window showing /l/e/ folder press the "select destination" button
8. Wait the process to be finished with an install/timeout error
9. Open terminal and execute "sudo reboot"
10. Enter the login password and press enter
11. Wait system to reboot
Thank you for any provided help.
Attachments
There is no errors in hackintosh log, only warnings. It says "kext with invalid signature allowed".
AppleGraphicControl.kext is in S/L/E folder. To replace it you need to inject the patched AppleGraphicControl.kext in S/L/E too. And remove the one which is now in L/E folder.
And if it is not done, you should have a clone of your system, in case you make your main system unbootable, playing with system kexts. An error like the one you did can be fatal.
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Likewise, it seems the attachment has gone missing.
Is anyone able to reupload (K610M)?
EDIT: Now resolved. Looks like a forum hiccup.
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It worked! Thank you!
I have a bootable high sierra usb hdd for that, thank you.
UPD: Maybe we need to add an info about AppleGraphicControl.kext destination to the original post because I think that right now it's unclear.
nikey22 removed it on his post. There should be a good reason. Ask him.
Add your hardware and software config and your potential problem to your signature - nobody here has a glas ball to guess or predict.
Rebooting could mean you added a incompatible kext or try to inject with OpenCore already installed kexts or your installation needs to be redone ... all guessing.
2011 iMac Graphics Card Upgrade
No, you won't get a picture on the stock vBIOS without a back-light mod, AMD users should flash the GOP vBIOS attached, you can do it from windows. Then use OpenCore to get boot-screen and brightness control with no other mods! https://www.techpowerup.com/download/ati-atiflash/ Download...
forums.macrumors.com
Didn't work. This time i didn't get reboot, but it's just black screen.2011 iMac Graphics Card Upgrade
No, you won't get a picture on the stock vBIOS without a back-light mod, AMD users should flash the GOP vBIOS attached, you can do it from windows. Then use OpenCore to get boot-screen and brightness control with no other mods! https://www.techpowerup.com/download/ati-atiflash/ Download...
Please add your hard and software to your signature - we cannot guess what you are talking about and we will not read back trough twenty pages and 100 posts to get it!
What does "black screen? mean? No post, no chime, nothing. Please describe a little more specifically what you did, which machine you have, which OS you are trying to boot. Otherwise most other will simply ignore your requests here...
Try to get an external display (miniDP connector) in case you hear a chime and the machines seems to boot. Sometimes you get a picture there...
This explained, thanks. on a 27-inch iMac, would the 770m perform at its peak?
And which models from the Nvidia Quadro would be the most powerful and suitable for my 21.5-inch model?
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Thank you!
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Another question, I flashed the 770m using Nick's Beta3 rom, and the boot screen only appears when I restart the system from windows. When I restart from macOS I don't have a boot screen, is this normal or did I do something wrong?