i updated from yosemite to 10.11.4 without any problems, but then ran the 10.11.5 update and it's bombed to the point it panics straight away straight after the 'aptiofix2drv' line right at the beginning. I think Clover set me to 15,1 - i wonder if that could be causing it. Odd cause it worked fine with 10.11.4, unless my radeon 6870 is suddenly no longer compatible. I will try going back to IGFX to troubleshoot.
Uploaded via the system update but sleep is not working anymore. Pressing sleep turns off the displays but the fans keep spinning. Do you have any ideas ? What files could help you from me to help me debug this?
While, not the answer, I went with a USB solution. Never needs fixing anything when it comes to sound