We have good news for Arma 3 Mac players: update 2.22 for the experimental client ports has been released.
Our partners at Virtual Programming have ported the recent platform update, which restores cross-play multiplayer with Windows.
As a reminder: the game's Launcher is not available on Mac. Please refer to the Community Wiki guide on how to load optional (Creator) DLC and mods.
Visit https://dev.arma3.com/ports for all details.