The product description declares that it is ready for the Mac right out of the box. OK, it makes a valid connection, but it suffers from about a half-second latency. It is impossible to record along with the canned bass and drums, which is pretty much all I want to do with my garage band program. So I am using the nifty adapter that was included, which allows me to connect my guitar cord to the mic input. I think I'll put the light cable on ebay because I hate driving into town, 30 mies round trip.