Need help: audio from MBox 2 Pro not making it to Logic 9

Mbox 2 Pro (Digidesign Drivers, Pro Tools) are not fully compatible with Logic Pro 9 and Lion/Mountain Lion - performance (if you get them to work together) leaves a lot to be desired. If you are running Pro Tools successfully, more often than not you will have MIDI driver conflicts. What you can do is completely remove Pro Tools Drivers and start from scratch getting the absolute minimum drivers necessary to run your Mbox 2 Pro on your system, and then try to load the Mbox in Logic. Just understand that natively it may not work well, lots of other interface choices if you are going to use Logic. Lots of stuff on the net about this. I had the very same issues, except my system, and all midi related softwares (Garageband and Logic Pro) became unresponsive when attempting to load either application. I would get a pretty consistent midi timeout errors, as well as both softwares hung for long periods of time before crashing. Check out the folder in finder Library\Audio\Midi Drivers to start - see what's in there - and just delete everything in the folder. Note you won't be able to load Pro Tools (if you use it) by removing the digi drivers. You can also uninstall the Mbox from the System Preferences menu. Give that a try - download new drivers for the Mbox 2 and see if Logic Pro works with it after some configuring. If that doesn't work, I'd switch to a new interface - I'm actually selling my Mbox 2 pro for something that actually works with Logic Pro Natively. Hope it helps!

I think the very latest Avid "Core Audio" drivers will work.

The local University's computer lab has been running Mbox 2's with Lion (not Mountain), I think 10.7.8, with no problems. They have Reason 6.5, Logic 9, PT 10, & Cubase (not sure if 5 or 6), + several others like Finale, Sibelious, and whatever the Ed. program uses. These are the USB interfaces. I have an Mbox 2 pro with L9 and also no issues - although I am on Snow Leopard.

Although I am eager to replace it, it can be made to work.

Edit: I also have PT 10 and run both, sometimes even simultaneously.

Do you have a direct URL where those latest drives could be found? May help the OP out - might even provoke me to give it another chance.

My issues have been paritally or completely related to using Mountain Lion - as I was once able to use Pro Tools and Logic 9 together in harmony. I am also on the firewire Mbox 2 Pro - same as the OP I believe 0 but since OP is using 10.7.4, - he may have much more success than I.

I have found a solution for anyone having audio issues (mainly sound deterioration in all music related applications/software). After troubleshooting for a month (and getting mad), I found something. When I upgraded to Mavericks thats when the issue arose. I managed to downgrade to Mountain Lion (since my new Mac shipped with Mountain Lion) although Im not sure its necessary to downgrade once you do what I did to fix the noise issue. This is more for Pro-Tools users and those who use Digidesign interfaces (I have an Mbox 2 Mini). I have Pro-Tools 8.03, but I uploaded a newer driver update for Pro-Tools 9, and everything is fixed now. There are certainly compatibility issues with OSX and third party software and devices, and both Apple and Avid (Digidesign) don't want to deal with anyone that does'nt want to upgrade to the newest stuff, but for those of us that cannot afford to upgrade and need to work, this is a solution.

Check your drivers!