[fayten]

This is an artifact of not allowing 32-bit applications on Catalina. It seems silly to blame Valve over this. Have you considered setting up bootcamp for gaming? Otherwise you can pick up fairly cheap refurbished laptops off eBay or amazon. Remember proton is for Linux, support has and always will be shotty for MacOS.

https://support.steampowered.com/kb_article.php?ref=1055-ISJ...

[pjettter]

Thanks. Yes. But none of this is obvious after the fact and a lot of googling. Apart from that, if you search for games on Steam and you want to play one, you don't find out that it's incompatible until after you buy it! (Unless you happen to find a friendly site that lists catalina incompatible games). It maddens me that I can buy something that ca't possibly work.

[smoldesu]

Be mad at Apple, not Valve. Apple made the decision to sunset 32 bit applications.