OpenCore only boots from the EFI partition when installer USB is plugged in

Hello all,

I've been trying to hackintosh my Thinkpad T480S with Ventura. I've been able to successfully install the OS to the SSD alongside Windows.

I followed Dortania's guide and copied my EFI to the SSD's ESP. This adds a new entry to my BIOS's Boot Manager, but refuses to boot into it, returning back to the Boot Manager as a result. However, this does not happen if the installer USB is plugged in.

I have tried OpenCore's Debug build, which returns with the same result. I have also tried adjusting my ESP's boot-args. However, I suspect that this isn't what's causing these issues.

Device Specifications:

  • i7-8650U (620 UHD)
  • 16GB DDR4
  • Lenovo NVMe SSD
  • Intel AC 8265

submitted by /u/xMellylicious
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