Launcher Version: 293
Operating System: OS X 10.8.5
Java: build 1.7.0_45-b18
I am having exactly the same problem. This is the first time I have tried to play Hexxit. I can launch and run the program but the lag is so slow it makes the game impossible to play. I have played Tekkit in the past with no problems. When I tried to play since the launcher update it is lagging also.
I would love to start playing Hexxit so a fix would be great.