I am using and iMac11,3 (mid 2010) with Catalina (with dosdude1 setup). After upgrading my GPU from ATI Radeon HD 5750 1 GB to NVIDIA GTX 765M I only get a black screen after booting (even after a long time).
- The old ATI card works fine. Do I need to install High Sierra and install Catalina again?
- Is it possible to „patch“ the current setup?
- Or isn’t it possible at all?