Multiple players reported on friend invites not working on Mac. More precise, the Invite screen would not pop up after selecting 'invite friend' from the game menu. It is still not perfect as it seems that with the current game engine we're using there is no way to make the invite work as intended. The workaround after the update is to select 'invite friend' from the menu and then press Shift + Tab to launch the Steam overlay, which would then allow you to invite a friend. In the long run we hope to have a proper solution as we understand this is not ideal. Cheers ~ Richard