BFRenzel, Appreciate your suggestion but all told looks like the update to El Capitan really messed up my stuff. I have no one to blame but myself as I should of waited to check compatibility bugs were all worked out. I blame Apple if anything for releasing a product that had core audio driver bugs that shouldn't have been released without working out those bugs. Alas, they are not the company they used to be. I was really wanting to check out the Garageband drums so I took a chance that backfired.
With this release I actually had a Focusrite i86 hooked up as my main preamp. I had some huge pops upon initial install of the new El Capitan and that preamp died on the spot and will now only flash red and green lights at a rapid rate. It produces no sound. I have been going back and forth with them for the last month and now they say I have to send it in for repair and pay full cost as it is out of warranty. Understandable.
I made the 2nd mistake of hooking up my former preamp, my UX2 and once again huge pops and then no mic signal. The weirdest part is that the outputs work fine, as do the guitar line inputs, but the mic line inputs will not work at all. I just get the loud hiss.
I have tried multiple updates, installs and reboots. No luck. Here's the really odd part. I have a KB37 keyboard that does the exact same thing.
Everything working but the mic input. I just get hiss. I can record guitar through the line inputs and I can listen back to sound through it. With this in mind, I think that the problem still may be the Line 6 update as I have the exact same problem on two devices. I have verified all Monkey updates and compatibility along with trashing and reinstalling the drivers multiple times on both devices with reboots each time. Its possible the problem is still related to the Apple Core Audio drivers. Maybe they haven't properly updated their drivers after the bad rollout. Maybe they just think they did and everyone else is playing catchup to a bad initial driver and update. I don't know. I just know I don't want to go through another long ordeal with an open ticket like I did with Focusrite only to end up having to pay anyway. Not that its their fault. I believe Apple is to blame. hey screwed everyone by rolling out those bad Core Audio Drivers. I'm sure they will never acknowledge it as I guarantee you there are plenty of guys out there like me who lost a decent preamp due to updating to their junk too early. Cheers for your help, Chris