treefit on Nostr: it's probably electron, which eventually means chromium. every so often they remove ...

it's probably electron, which eventually means chromium. every so often they remove support for older operating systems.
Most other electron projects will have the same issue. (even Delta Chat will eventually increase the requirement when electron forces it)

But you should be able to fork signal and self build it by downgrading electron dependency or whatever else made them upgrade the minimum OS version. Besides that maybe installing linux on your Mac could be an option.