hey guys. i also upgraded to eyetv4 only to find out it didn't work. there is a solution. simply return your computer to the mojave OS and never upgrade. may not be the best solution but it will most definitely work. eyetv is a terrific piece of software. best editing tool i've ever used. but the upgrade is no good at all. if you want it back, downgrade now. Mojave forever!!! 😉