After recently getting back into Rock band I found the customs forum… I was excited to try some customs but I only had a Mac to load them. I found a few posts with limited info but enough to convince me it was doable. I bought a 360 yesterday and a copy of Rock Band 3. With some limited info, a little guess work and some reverse engineering I figured out how to load customs onto a flash drive using a Mac…. no boot camp no virtual machine just dragging and dropping files. I plan to make a detailed tutorial on how to do this to help others. Rock on!