How are you connecting the Mac to the Q10?
Presuming it's via the USB 3 port on the back then, using a PC here, the drive is visible as a normal USB HDD. Nothing special in settings, just connected it all up and drive was visible.
I'm no expert in things Mac. I'd be looking at whether the Mac can read the format of the drive (how did you format it? It should be NTFS / EXT2 for the Q10 which a Mac may have trouble with). You may be able to install something on the Mac to allow it to read these formats. NTFS is standard Windows format.