MOTUnation.com

Hi, I have a problem with the audio interface referred to the object.
I used this interface Motu Traveler mk3 for years with profit, using it with a Mac mini late 2009 OSX Snow Leopard, connected by firewire.
Now I did have a Mac mini mid-2011, with OSX Mountain Lion.
I installed official latest drivers, downloaded from the official website Motu, but the interface emits strange intermittent hum and white noise when it play sounds or music.
I tried the interface with the included power supply, and not firewire, but there are the same intermittent noises.
The problem is not a defect in the interface, because I've tried it connected to my old Mac mini or PC, feeding it with firewire or with power supply, audio defect does not occur and the interface works without problems or noises.
I have read that many users have had this same problem, so I wanted to know if here MotuNation you have some tips for me to solve and if it is aware of the problem, which, however, appears to have been presented in Motu also by other users.
Thank you very much, I am waiting on news.
Sincerely,
Francesco Barbata.
Disco33-staff-

Update of 29.08.2013: SOLVED.

I contacted the support Motu (customer service) and they sent me a firmware updater in beta version (they ensure soon an official release version on Motu.com) aimed at solving these problems and disorders audio noises and troubles.

Here's how I eliminate problems, noises and interferences on the audio playback:
1) Formatted Mac Mini 2011 and completely reinstalled OSX 10.8.4;
2) Installed the official Motu Audio Setup for Mac OSX, downloaded from the website Motu.com;
3) Launch the firmware updater and updated the interface to the new firmware;
4) Power off and restarted the mac mini and the Motu Traveler Mk3.
After these operations I have not had any problems playing or recording, no hiss, noises, troubles or audio within suspicions.
Keep in mind that I have also powered the interface with the external power supply 12v, avoiding power via firewire, and selected external power switch on the side of the interface.
I also sent the outputs 1-2 (main out) of the Traveler Mk3 to a stereo input of a mixer (Behringer Xenyx 1832FX) and then, through connection with balanced XLR cables cannon, I sent the main out of the mixer to the monitors.
Probably this use of a balanced connection was eliminated noises and interferences sound.
I hope I might be able to help this update on the subject.
Health and Grace,
Good Music!