what doesn't work out of box:
1. volume control on the device
3. osx volume control
4. 5.1 (though, i don't need it)
1. out of luck, device doesn't work like HID device, so, only custom drivers needed.
2. the same as 1.
3. if u only need volume control in os - use soundflower app (google it), and set your output device to soundflower 2 ch, then, in soundflower tray select sb x-fi at 2-ch part
well, i decided to continue to search for max compatible osx sound interface... it's good, that my girlfriend is locked on windoors user (3dsmax) and she'd like a better sound than integrated, so my purchase wasn't useless ))