I've used Serato for 4yrs now on a Mac & I have'nt had one problem yet! I bought the TTM57 about 7months ago & running video with no F--kin problem. I have a friend who uses Torq & has problems all night,computer freezes,songs won't loadup etc. I've been djing for 28yrs now & Serato is the best technology that a Real Dj can have.