I use Logic Pro in my studio on a Mac Pro, still staying on Snow Leopard as I want to wait a bit to jump to Lion. I teach Logic Pro on my 'old' white Macbook 2.0 GHz (Core2Duo), also on Snow Leopard and it's really stable. But now some applications need Lion in order to work. Is there anyone else using Logic on Lion with the same Macbook? Is it performing well? Is Lion processor-heavier than Snow Leopard so that Logic songs might not run anymore (without freezing some tracks). I can't afford to teach Logic and have it crash in front of a bunch of people. Maybe I need to buy a new Macbook, but I hope I can postpone it a bit. I hope anyone can help here. Thank you!