Distorted Playback with Mbox2 Pro

[redinmyhead]

Just installed PT10 on a new i7 2.9ghz macbook pro running osx10.7.4. When using the Aggregate driver through the laptops internal soundcard there is no issue with playback; switching the playback engine to a mbox2 pro results in diminished volume and severe digital distortion occurring over all channels in any session tested.

This issue occurs in both the 10.0.0 and 10.2.0 installs for PT10. 10.2 is what is currently installed on the machine.

There seems to be only one driver that is officially endorsed by digi for the Mbox2 on a mac system.
Am I missing something?
Has anyone else encountered any avid firewire interfaces with symptom?

[redinmyhead]

Aaaaand it turned out to be the actual cable. System Profiler showed the device correctly so I incorrectly assumed full performance from the cable.

Old cable. Cheap fix. Thank Goodness.

[Audio Rage!]

I'm having the exact same issue...it's driving me CRAZY! Which cable did you replace? The USB plug from the Mbox?