Hello, I tested it yesterday.
It works fine and faster than previous version. About the render, the emulator is stable for me, no more crash occured.
I activated the speed limit option but it seems faster than the original hardware.
Perhaps it's just in my mind because games are fully playable.
I tested some games like Aladdin, Streets Fighter II (6 butons pad), Streets of Rage 3, Landstalker (PAL French), Virtua Fighter 2... Only Virtua Racing (bin and smd dump) is not supported, but I don't remember if this game with the lastest official version of Genesis Plus was emulate.
This is great work as always and I'm happy about your return in the mac emulation world. :)
Have a nice week end ;)