In this video, I go over the process of installing macOS 10.15 Catalina on an unsupported Mac. This entire process involves the use of my "macOS Catalina Patcher" program, which I wrote to automate the installation process. Download and instructions can be found here: http://dosdude1.com/catalina

If you need to disable the AMD video card on your 2011 15"/17" MacBook Pro (MacBookPro8,2/8,3), you can follow the guide found here: http://dosdude1.com/gpudisable