Hey, I'm having issues with sound. I just installed Sierra on an EliteBook 840 G1 and everything works but sound. On El Capitan, I would just rebuild the kernel cache, boot without caches, restart a few times and it would work. However, that's hot happening this time. I can't boot without caches (I know that was removed in Sierra) and I don't feel like
"sudo touch /System/Library/Extensions && sudo kextcache - u /" does much anymore because I get this error whenever I use it:
KernelCache ID: 2CEDA9241D6DE8E93C03F2DD3AE910B1
symlink("/System/Library/PrelinkedKernels/prelinkedkernel", "/System/Library/Caches/com.apple.kext.caches/Startup/kernelcache") failed 17 (File exists) <createPrelinkedKernel 2795>