Steve “Udyr” Mieczkowski, associate producer at Riot Games, announced that a native Mac client for League of Legends is on its way to open beta soon, and is currently in testing mode at the studio.
“To make this happen, we’ve been hard at work: Riot engineers re-wrote a lot of the underlying game engine so that both PC and Mac platforms share the same code base and assets. This means Mac players will receive all future features, bug fixes, and new content at the same time as PC users.”
The studio has publicized a PBE (public beta environment) version of the client for anyone interested in a download. Make sure you leave the team feedback so they can fix any bugs you come across. Download the Mac PBE client here, patch up, and log in.