Reboot stuck - OpenCore with GA-EP45-UD3L (Core 2 Q9400, GTX 660Ti, High Sierra)

This was my first Hackintosh in 2009 with Snow Leopard and I have been updating it ever since. Almost everything is working well in High Sierra, including shutdown. Only Reboot does not get back to the BIOS: it shuts down mostly, then switches off the screen and stays stuck with the power LED still on. This was working fine in Clover. Sleep also does not work, but never really worked in the past.

I have tried various settings and fixes including FadtEnableReset, but nothing works to fix Reboot. What would you recommend?

I generally followed the Opencore Vanilla Desktop Guide and the OpenCore Configuration.pdf - the parts I configured differently from the Guide are noted here in more detail: Gigabyte GA-EP45-UD3L · chriswayg/hackintosh · GitHub, which also has the EFI folder with config.plist, the DSDT.aml and all other files. An important addition was the RTCMemoryFixup.kext to prevent BIOS reset, as the OpenCore built-in RTC fix did not work.

Amazingly I was still able to boot into my old macOS 10.9.5 Mavericks partition on the second drive, which works just as well with OpenCore as in 2015 with Clover. Audio, Nvidia Web Drivers and Ethernet are all working.

Specs

  • CPU: Intel Core 2 Quad (Yorkfield) Q9400 @ 2.66 GHz (OC up to 3.52 Ghz)
  • MB: GA-EP45-UD3L LGA 775 (rev. 1.1 Bios F7)
  • RAM: 4 x 2GB G.SKILL DDR2 1333 MHz
  • HDD: 2 x 3TB Seagate Barracuda ST3000DM001
  • GPU: ASUS GeForce GTX 660Ti (Nvidia GK104) with dual 1080p monitors
  • macOS High Sierra Version 10.13.6 (Build 17G9016)

Working

  • Audio, Video, Ethernet, USB, NVRAM
  • Nvidia Web Drivers
  • Shutdown
  • Reboot does not get back to the BIOS, but switches off the screen and then is stuck (was fine in Clover)
  • Sleep does not work
  • press Option key to see OpenCore boot menu

Kexts active

  • AppleALC.kext
  • Lilu.kext
  • RealtekRTL8111.kext
  • RTCMemoryFixup.kext
  • SMCProcessor.kext
  • VirtualSMC.kext
  • WhateverGreen.kext
submitted by /u/ChrisWayg
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