Fix iGPU-only iMac14,x display output

Closes https://github.com/dortania/OpenCore-Legacy-Patcher/issues/661

CHANGELOG.md

@@ -6,6 +6,7 @@
   - See additional notes before updating: [VMM usage notes](https://github.com/dortania/OpenCore-Legacy-Patcher/issues/543#issuecomment-953441283)
 - Adjust SIP setting to better reflect current SIP usage
 - Resolve Monterey Bluetooth issues on user-upgraded BCM94331 BT4.0 modules
+- Fix iGPU-only iMac14,x display output when using Minimal/Moderate spoof
 
 ## 0.3.1
 - Increment Binaries:

resources/build.py

@@ -418,6 +418,10 @@ class BuildOpenCore:
                     }
                 elif self.constants.serial_settings != "None":
                     self.config["DeviceProperties"]["Add"][self.gfx0_path] = {"agdpmod": "vit9696"}
+            if self.model.startswith("iMac14,"):
+                if self.computer.igpu and not self.computer.dgpu:
+                    # Ensure that agdpmod is applied to iMac14,x with iGPU only
+                    self.config["DeviceProperties"]["Add"]["PciRoot(0x0)/Pci(0x2,0x0)"] = {"agdpmod": "vit9696"}
 
         # Audio Patch
         if self.constants.set_alc_usage is True: