update, listed under know issues.
General Mac OS X issue - switching the sample rate
Under OS X 10.8 it is not possible to switch the sample rate. This issue occurs with all audio hardware interfaces, including the Steinberg CI, MR and UR series.
The sample rate does not switch with the cubase project settings as before, but it is also showing a message
“Warning sample rate note supported by hardware” All settings at 44.1.
Thanks in advance for any advice.