For under $275, I now have a second functional iMac that rivals the performance of my 2017 iMac (and in some cases beats it!). And with the most recent version of the Catalina Loader, it only made things easier when I installed the SSD and upgraded to Mojave a couple of days ago. Starting out with High Sierra was key to help get through some of the initial stages of understanding the process.
Thanks to you guys (and some learning and trial and error on my own) I have brought my 27" mid-2011 i7 iMac fully back to life, including installing a 1 TB SSD, the WX7100, and upgrading it to Mojave. To Baillargeau, and anyone else who has been a key member of the never-ending modifying, testing, and evaluation of the files, workarounds, and procedures on this thread: 16bit resolution glitch of UGA_DRAW_PROTOCOL - temporary solution: activate a sleep cycle and return, this should now clear the issue.ĩ-4-2020: please note the 870M_6GB_UGA.rom is experimental and in testing phases for those interested and have the card.ĥ-3-2021: I've removed 870M_Clevo_BR.rom because it is not functional and replaced it with GTX870M_V1.rom, appreciate for testing. If you have a different machine, your panel ID can be found by going to System Preferences > Displays > Color > Open Profile > mmod The above data pattern will allow for a wider span of steppings for the brightness control and utilizes more of the capacity of the HD3000. Drag your modded kext into Kext Utility, allow it correct permissions There you find several Apple LCD profiles.ĪBEABgALABQAHAAnADMAPwBOAFwAZwBzAIEAkQClAL8A2wD/ĪBEAAgA3AF8AigCzAOsBJAFnAakB1AIJAlQCogL4A00DlgRpBGk= Scroll down to: IOKitPersonalities > AppleIntelPanelA > ApplePanels Navigate to S/L/E (System/Library/Extensions) MacOS Catalina: requires you to make root writeable: sudo mount -uw / Turn computer on, hold down Command(⌘)-R ⦁ Genuine ‘gray’ early-boot screen (stage 1 & 2 progress bar) The frame-buffer depth issues remains for now, and can be temporarily corrected by entering a sleep cycle.Īs previous, these roms should bring back:.They will require a modification of the base AppleIntelPanelA/ApplePanels/F10Ta007 brightness stepping.These ROMs do not require a 3rd party bootloader like OpenCore.
Please feel free to test on other MacOS versions, I will update this post as necessary with success/failures.
Tested on a 2011 iMac using High Sierra 10.13.6. When I removed the rivets, and used screws to secure it, I was able to get a much tighter seal and the card boosted properly. It was thermal throttling early as it sensed an overheat situation. When I purchased this card, the rivets were very long and kept too much of the GPU away from the heatsink surface.
It is boosting fully even at base clock speeds. I'm happy to report that macOS sees all the ram. The GTX880M is the first 8GB VRAM card to work in our machines! I now have as much vram as system ram. Maxwell (GM107) N15P-GX-A1? - non-function with MacOS cannot trust sources with GPU Variant Please use High Sierra to update your BootROM to latest version. pkg file and run it in MacOS 10.12 or higher.
Here's the link to download it, simply unzip the. I also uploaded it to Sync which has unlimited downloads so it shouldn't expire or be pulled if it gets popular. I tried this on a 2010 iMac 21.5 as well as a 2011 iMac 27" and they both worked perfectly for simply creating the bootcamp partition to use for flashing purposes.
No bootcamp drivers were loaded to maximize portability. Also the Page file and Hibernate file have been pared down to 2GB each to avoid running out of space at 15gb. Teamviewer has been installed, and the NVtools folder is on the desktop with the flash rom files ready to go. It requires 10.12 Sierra to begin, and it simply adds the bootcamp image to your internal hard drive on a 15GB partition it creates.
I'll write up a detailed post later on in the week, but in the meantime I used the Winclone idea posted here earlier by FlorisVN to make a package installer Windows 7 Bootcamp so there is no need to install Winclone or do any other trickery. I spent some time last week changing out one of my kids 21.5" 2010 iMac video cards for a K1000m.