Does this link help:
& this (look under compatibility alerts):
unfortunately, Digidesign don't have a great record at getting driver updates for a new OS out quickly.
Oh, this link may help too:
So, the best thing to do when using Digi based products is to not upgrade OS's until 1. You have a clone or backup of your system. 2. You are sure that Digi have released drivers for you hardware.
Well, believe me when I say that although I always talk about backing up to everyone I know... I get caught out occasionally - btu it's the best way to learn. Although this situation will not feel great - there are ways to resolve it.
Best thing to do now would be to roll back to Leopard (you will be able to use Logic and Pro Tools M-powered/Mbox Pro 2) manually backup all your important files to an external hard drive and/or DVD. You should do this anyway to keep your data/projects safe. That extra 10 or 30 minutes a week spent backing up data can save hours (and hair ;) in the long run!
OK. I'll stop lecturing you now.
First contact Digi tech support and see if they can help to resolve this issue. If not...
1. Backup important data to an external drive.
2. If you have any personal loops, presets, key commands in Logic then transfer them to the external drive.
3. Double-check you have everything you want/need backed up.... if possible transfer the ENTIRE contents of your system to another external HD or partition on the same external drive.
Rule #2 = you can never back up too many times!
4. Insert the Leopard disc. Run install but instead choose to erase the Macs hard drive.
5. Then choose to install Leopard from the disc.
6. Once done. Update to 10.5.8 and install Logic 9. Install any drivers that might be required for the Mbox Pro 2 for leopard.
You should be good to go now.
I would recommend contacting and talking to a tech support guy/gal about the Mbox Pro 2 before doing any of my suggestions above!