[orchetect]

Thanks for the update. I too have an Mbox 2 mini with the 10.3.3 drivers installed, then upgraded to Yosemite and the device disappeared - no green LED light, "Unable to connect to Mbox 2" in the preference panel.

I will tinker with the 10.3.3 driver like you suggest and see if I can coax it into working again.

Cheers

EDIT: Aha! Success! (For Now)

Here's what I did to get the MBox 2 mini to work:

1) Manually uninstalled the driver components (delete, then empty trash):
• /System/library/extensions/DigidesignMbox2.kext
• /System/library/extensions/DigidesignMbox2Boot.kext
• /Library/Audio/MIDI Drivers/DigidesignMbox2MIDI.plugin
• /Library/Startupitems/Digidesign Mbox2
• /Library/Startupitems/DigidesignLoader

2) Opened System Preferences, right-clicked "Digidesign MBox 2" icon, selected "Remove "Digidesign MBox 2" Preference Pane"

3) Rebooted

4) Installed Mbox 2 Driver 10.3.3. After, the computer rebooted.

5) Switched the physical USB port the MBox was connected to, then after a few seconds the green LED came on and it's working normally now.