I have a report from a russian user that Audacity 1.2.2 doesn't want
to know DigiDesign hardware. This guy has HD Accel, G4 867, 768 RAM.
He says that sound hardware is visible in Preferences, but no sound
comes in and out. Currently he can work via Digi Core Audio Manager
As nothing special seems to have changed in Mac OS X specifics for
1.2.3, this issue might be actual for it as well.