[HELP] OCB StartImage Failed - Aborted (Dual Boot specific issue)

  • Hardware: Laptop
  • CPU: i5-6200U
  • GPU: HD 520
  • RAM: 2x8GB 2133MHz DDR4
  • Motherboard/Laptop model: Dell Latitude E7470
  • Audio Codec: ALC293 (ALC3235)
  • Ethernet Card: I219-LM
  • Wifi/BT Card: 8260AC
  • What guide/tool followed: OpenCore Official Guide + OSXLatitude
  • What part I got an issue with: OCB StartImage Failed - Aborted when Dual Booting ONLY
  • What files/config I am using: OpenCore 0.7.2, latest kexts, device tailored SSDT from OSX Latitude
  • Extra Info: macOS 11.5.2 and Windows 11 are each installed in their own drives and use their own EFI's. I do not plan to pick Windows on OpenCore at all.

1st SSD is a WD SN750 Black for macOS (laptop limitation uses only x2 lanes).

2nd SSD is a WD SN520 for Windows 11, limited to 1x lane, and is on the WWAN slot (2242 form).

When both SSD's are present, macOS wont boot from OpenCore and gives me the "OCB StartImage Failed - Aborted" error and reverts back to the OpenCore boot picker. Randomly sometimes it boots up with both drives connected.

Removing the Windows SSD, macOS will boot without any issues.

EFI is optimized and fully functional once the system is up and running, with virtually everything working.

Debug that fails to boot.

Debug that boots correctly.

Author: @PlutoDelic