You'd probably get a better answer posting this question in the Audio Forum. Does audio work when you select another output after yanking out your headphones? I'm using optical out and only have BT headphones I've not checked the logs since the new console is something I've not looked at much, good thing is that the logs are not not causing trouble for you system performance. I use this system for PS and FCPX and I can't complain about the performance. It is certainly stable. You can install your SSDT for power management since this will make your system perform at its best. It is inf act Intel Power gadget that is is reporting the incorrect frequencies with Haswell CPU's. SLI isn't part of the the OS X/macOS ecosystem but dual cards do perform better in Mac from what I've read. I have no experience with this so If you choose to take this route I'd like to hear it. You're welcome jothu010.