Specs: mobo 990XA-UD3, cpu AMD FX-6300, 8GB RAM, various SSD and HDD disks, fully working Catalina OS X 10.15.6 with Opencore 0.6.1
My sytem works fine with Catalina (everything except Safari crashes with Youtube and FaceTime crashes on video calls, but iMessage works fine), with Opencore 0.6.1...