Figured I'd post this in the Mac Mini forum too since it applies to both the mini and the iMAC. Can anyone confirmed they are successfully recording using USB 2.0 interfaces on the USB 3.0 ports under Mountain Lion or Mavericks? Something like a POD HD or a Scarlett 2i2? In researching whether to build a new PC or get a Mac, I came across reports of problems using USB 2.0 interfaces on USB 3.0 ports due to isochronous streaming. The Audio crackles or distorts or the USB 3.0 ports just stop working. Most problems are with Windows, but a couple did involve OS X. The fault is something related to Intel and the Ivy Bridge chipset controlling USB 3.0. The reports tend to dry up around the beginning of 2003, so perhaps Microsoft and Apple fixed something.