The Mac version isn’t opening links for me. Is it my laptop or the app?
Iris Desktop is here! No more dependency on Iris.to domain name, hosting provider or internet access. This version doesn't have the autoupdater, so I can't even push broken versions.
Macos, Windows and Ubuntu versions available. They're built by Github CI, so they're unsigned for now. You'll have to override the "unidentified developer" warnings. Mac instructions: https://www.macworld.com/article/672947/how-to-open-a-mac-app-from-an-unidentified-developer.html
https://github.com/irislib/iris-messenger/releases/tag/app-v0.1.0

Discussion
Seems to be the app.