The ig-platform-id didn't really match with what you said. The SMBIOS seems to have changed properly. But the graphics are only in VESA mode.
 
	 
 
	I'm using OpenCore Configurator and the settings I had under DeviceProperties were,
 
	 
 
	AAPL,ig-platform-id - DATA - 09001659 
 
	device-id - DATA - 16590000
 
	 
 
	I changed to,
 
	 
 
	AAPL,ig-platform-id - DATA - 09001619 
 
	device-id - DATA - 16190000
 
	 
 
	Is it correct?