marklin wrote:Ok, so I tried using a 2.0 powered hub - still a lot of noise if I'm using the built in line/headphone minijack out. The noise appears even if I just play a file in Quicktime, so it's not limited to MPC software.
Tried using a firewire interface and this eliminates the noise.
Anyone contacted Apple? - can't seem to find anything useful on their support forum...
My machine has the same specs as the ones mentioned above by Smoothbassman even though I bought it back in November. Also running 10.8.2 (12C3012)
Your Mac is still under warranty. I would make a genius bar appointment and take your hardware in and let them see whats going on. There has to be some issues with the hardware, or some driver conflicts.
I did do some system tweaks after installing my SSD. All of those tweaks can be found on this site.
http://icomputerdenver.com/ssd-optimization-for-mac-os/I don't know if that has anything to do with the issues you are having though.
My current setup is my MPC hooked to the USB 3.0 ports and a WD USB 3.0 hard drive hooked to the other port. Everything else is daisy chained off the MPC USB ports.