@dan81 said in unmet dependencies on 2020-08-20-raspios-buster-arm64:
so , the only benefit to run retropie on 64bit system (on raspberry) is use dolphin-emu
Check out this thread if you really want to push for Gamecube on the Pi.
https://retropie.org.uk/forum/topic/28459/latest-gamecube-developments-on-pi4
From reading that, some games work ok, but many others are not likely to run well enough to enjoy playing them. Running Dolphin is a pretty big job for a Pi 4.
EDIT: As development continues on the various drivers and even Raspberry Pi OS 64-bit, this situation could improve. But keep in mind many of these things are outside of the control of the RetroPie project.