I am in the same boat as you. I updated to El Capitan and my Mbox USB interface is no longer recognized.
If you scan the forums you will find that other MIDI interfaces appear to have stopped working as well, it is not just the Avid MBOX 2. This points to the issue being on Apple's side, but I can't say for sure..
- Mbox 2 Pro Driver 1.6 (Windows) 0 MB Mbox 2 Pro Driver 9.0 (Mac) 0 MB 0 MB.
- Download the latest Avid Mbox Mini driver for your computer's operating system. All downloads available on this website have been scanned by the latest anti-virus software and are guaranteed to be virus and malware-free. Digidesign Mbox 2 Pro Driver for Windows 7 32 bit, Windows 7 64 bit, Windows 10, 8, XP.
- Free drivers for M-AUDIO Mbox 2. Found 2 files for Windows 8.1, Windows 8.1 64-bit, Windows 8, Windows 8 64-bit, Windows 7, Windows 7 64-bit, Mac OS X. Select driver to download.
Mbox 2 Pro Mbox 2. Digidesign CoreAudio Driver 7.4.2 2010-07-18 10:10:47 By ivanhorn. If you are installing Pro Tools 7.4.2 for Mac OS X 10.5.3, you should use the Digidesign CoreAudio.
I am hoping for a fix from Apple in the next point release as I am mid-project as well...
Drivers For Mbox 2
In the meantime I would recommend submitting a bug report to Apple. Hopefully the more of these they get the more likely we will see a fix..
Driver For Mbox 2 Pro Mac Download
Oct 13, 2015 7:04 AM