Hi *******, thank you for your reply. Can you remember which hardware-configuration you used while patching and which OS you used to do it?
For my next attempt I did a PRAM-reset put in the harddrive in Bay 1, put in the default gpu (ATI Radeon 5770) and I am considering installing High Sierra first with the High Sierra-Patcher to run the APFS-ROM-Patcher in High Sierra, whereas I thing this can't be the Problem. I will report my progress 😁
I appreciate your advice. As ROM-patching is related to installing Mojave/ Catalina on an unsupported mac, and
dosdude1 has written the APFS ROM Patcher Tool and is the threadstarter, I thought this is the perfect place for my question. Maybe I should write him an email, but I hoped that anybody here ran in the same problem with the same mac and found a solution...