I just tried it out in the El Capitan beta, and I was getting about 30 - 45 fps tonight on standard laptop settings at 1440p. There are some weird issues with windowed mode though. When I try to run it in windowed mode, the client will jump up to the top of the screen and cut off a large portion of the window. Hopefully they will get a metal update out soon since the public beta is out now. I'll have to compare my performance tomorrow at prime time.
