[PD] error with RME Fireface + Mac Mini

[João Pais]

Hi list,

a friend who doesn't work usually with Pd is trying out a new system:

Mac Mini (around 2-3 years old)
OS X 10.6.8
pd-extended 0.42.5
RME Fireface UFX

Pd works fine, as long as the input count setting in Pd is set to 16 or  
less, all inputs work. If I set it to 17 or more, all inputs stop working.  
Outputs continue to function, though.

I've told him already to try out a previous + nightly build of Pd. He  
replied
"The old version seems to silently crash after changing audio device to the
Fireface. The new versions don't even manage to start up properly."

Does anyone has a suggestion to give?

Thanks,

João