Hello, I have just installed the latest drivers for the Tascam US122MKii in order for it to work with Mavericks. I have also updated the firmware. I use Logic Pro X and garage band and have a Mac book Pro. The tascam hardware was working fine with OS X 10.6, but, now I cannot get any input ports therefore Tascam and Garageband are not talking to each other, so not getting any sound though MIDI interface. Can anyone help? Thanks. Liz.