Apple dropped support for 32-bit software in October 2019. It's been four years and still Gog Galaxy doesn't display which games in my library are 32-bit so that I can avoid installing them.

Steam already has a filter that detects my architecture and shows only games that will run on this Mac.

I currently have to guess with Gog: If I install a game from my library and it's 32-bit, it installs without issue but fails to run saying 32-bit applications are no longer supported. Unfortunately wasted download and time.

Gog can you give the community an update on why this hasn't been added and if there are plans to do so?

As I am not a Mac user myself, I don't know if these links may be of any help for you, and it's not what you're looking for anyway (I guess)...but maybe try 'em?
[url=https://www.pcgamingwiki.com/wiki/Category:OS_X]https://www.pcgamingwiki.com/wiki/Category:OS_X[/url]
[url=https://www.pcgamingwiki.com/wiki/Category:Mac_OS]https://www.pcgamingwiki.com/wiki/Category:Mac_OS[/url]

They come with info about the supported OSs. [attachment]

I appreciate the help but this post is a feature request for the Gog Galaxy software. I know how to use Wikipedia and other sites but don't want to do that for every game in my library.

Thanks for posting in any case.

Given that GOG will almost certainly never do this, the best thing you can do is make a 64-bit tag and then manually tag your 64-bit games. If Galaxy could filter by "not" tags, it would be easier to make a 32-bit tag and only tag the 32-bit games, since there aren't that many, but of course Galaxy can't do that.

The other possibility is to ignore Galaxy and just use offline installers. That way you can click on a game in your library (using a web browser), select More -> Store Page and Reviews, and see if the game has Mac system requirements. If it has a 32-bit Mac version, the Windows system requirements will note this (yes it's nonsensical).