I'm afraid not. I don't even have a Mac that's capable of running OSX Catalina. The laptop that I built the game on was one of the old white brick Macbooks, the 2009 edition.

My understanding is that Apple is going to kill OpenGL soon anyway, so the writing is on the wall.
=(

This is why I took the game off the OSX Steam store. Not really happy about it, but that's life.

I should add something.

If this is a really big deal for you, I'll be happy to send you a refund. I don't want anyone to feel like they were treated unfairly.

Dude,
I got WAY more than my money's worth with that game. I'd buy it another 2-3 times. I have a gaming PC, so if I really feel the need, I'll fire it up over there. It was just a really good laptop game.

Honestly, if you were to put any more effort into it, what you really should do is port it to iOS. You might actually get a return on that work.