For the last few years I have have been using logic to record. I still maintain a drive with 10.6.8 and Pro Tools 10.3. I needed to go back To use PT's for a few older projects and when I did Pro Tools wasn't able to open a new session. I tried the troubleshooting advice given on Avid's website to no avail and decided to re-install Pro Tools. The installation worked. but now the only audio I/O choices it gives me are for Built-In inputs and outputs. AudioMIDI setup sees the IF and allows me to add it to the Pro Tools Aggregate and the IF driver application sees the card and locks. The IF driver on the boot drive is the one I had been using successfully with this version of Pro Tools in the past. I've rebooted the board and the computer several times but to no avail. I haven't installed Pro Tools in a long time and can't figure out what I'm missing!