![Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur](https://preview.redd.it/xhgttch88b161.png?auto=webp&s=a682d0ac5bb5ea2aee0b30ce7aa79e946dc59be0)
Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur
![Amazon.com: 6-in-1 MacOS Ventura/Monterey/Catalina/Mojave/High Sierra/El Capitan, Bootable USB Drive 3.0, Full Install/Upgrade/Recovery/Restore Mac OS X : Electronics Amazon.com: 6-in-1 MacOS Ventura/Monterey/Catalina/Mojave/High Sierra/El Capitan, Bootable USB Drive 3.0, Full Install/Upgrade/Recovery/Restore Mac OS X : Electronics](https://m.media-amazon.com/images/I/71VS1gzPwAL.jpg)
Amazon.com: 6-in-1 MacOS Ventura/Monterey/Catalina/Mojave/High Sierra/El Capitan, Bootable USB Drive 3.0, Full Install/Upgrade/Recovery/Restore Mac OS X : Electronics
![Apple Releases macOS Catalina 10.15.7 With Fixes for WiFi Bug, 27-Inch iMac Graphics Issues - MacRumors Apple Releases macOS Catalina 10.15.7 With Fixes for WiFi Bug, 27-Inch iMac Graphics Issues - MacRumors](https://images.macrumors.com/t/UEHcHiSGuJJjTLepZRhik6KAtAY=/2166x/article-new/2020/09/Catalina10.15.7GFXFixFeature.jpg)
Apple Releases macOS Catalina 10.15.7 With Fixes for WiFi Bug, 27-Inch iMac Graphics Issues - MacRumors
![Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me. Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me.](https://i.redd.it/659ugq09ypm41.jpg)
Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me.
![Amazon.com: 5-in-1 MacOS High Sierra | Ventura | Monterey | Big Sur | Catalina, Bootable USB Drive, Full Install/Upgrade/Restore/Recovery Mac OS X : Electronics Amazon.com: 5-in-1 MacOS High Sierra | Ventura | Monterey | Big Sur | Catalina, Bootable USB Drive, Full Install/Upgrade/Restore/Recovery Mac OS X : Electronics](https://m.media-amazon.com/images/I/61UzE3RtApL.jpg)
Amazon.com: 5-in-1 MacOS High Sierra | Ventura | Monterey | Big Sur | Catalina, Bootable USB Drive, Full Install/Upgrade/Restore/Recovery Mac OS X : Electronics
![How to Install MacOS Catalina 10.15 on an Unsupported Mac, iMac, Mac Pro or Mac Mini in 2022 - YouTube How to Install MacOS Catalina 10.15 on an Unsupported Mac, iMac, Mac Pro or Mac Mini in 2022 - YouTube](https://i.ytimg.com/vi/mytdmyZNgsM/maxresdefault.jpg)