ok, this is sooo weird... Let me tell ya. I have been previously using the macbook with tiger. Used the 57 on it 3 times a week no problem.. NEVER. I bought a new macbook pro previous generation. Been playing it with my pioneer mixer and sl1. No problems. So I assume everything good with the 57. So i go to the venue and plug in and its not connecting. I have everything hooked up right. Tried 2 usb cables checked like 4 times. It actually froze my computer. Never ever seen this screen. It told me to power off my computer. Never seen a screen like this with the 3 yrs ive had this. So i keep connecting and i get an error were it hardware failed. If anybody knows whats going on please let me know. Right now im using my back up but i wanna get into video and everything. Please help