Remember this error:
“iTunes/Apple Store Content Access Problem. Content playback may be disabled on this computer. You can continue to use the machine, but you should contact an Apple support representative. ErrorCode: 8877652”
Well. That appears to be found in Skylake based hardware, but I have good news for you. You can solve this by renaming Device (HECI) to Device (IMEI) in your DSDT/SSDT and then this error:
kernel: IG: ME PCI ACPI device not found – PAVP services will be disabled – add IMEI to EFI / ACPI device list
In /var/log/system.log will also be gone. By the way. PAVP is short of Protected Audio Visual Path
Note: You may not see the above error without the ioppf=0xfff boot flag!
Update: I should have made it clear that the AppleIntelSKLGraphicsFramebuffer.kext checks for “IMEI” so this is meant for people with Skylake based hardware!