iMac Mid 2011 GPU acceleration problem after installing Catalina dosdude1 Patcher 2020 | MacRumors Forums
![APPLE IMAC 14,2 LATE 2013 27″ I5-4670 RAM 16 GB SSD 1TB+128GB MACOS CATALINA GEFORCE GTX 780M 4GB GRADO B SOTTOCOSTO – Pc Ricondizionati APPLE IMAC 14,2 LATE 2013 27″ I5-4670 RAM 16 GB SSD 1TB+128GB MACOS CATALINA GEFORCE GTX 780M 4GB GRADO B SOTTOCOSTO – Pc Ricondizionati](https://www.pc-ricondizionati.com/wp-content/uploads/2019/01/imac-2015-pc-ricondizionati.jpg)
APPLE IMAC 14,2 LATE 2013 27″ I5-4670 RAM 16 GB SSD 1TB+128GB MACOS CATALINA GEFORCE GTX 780M 4GB GRADO B SOTTOCOSTO – Pc Ricondizionati
![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.
![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)