macOS does not necessarily report the correct output resolution! But there is a standard utility called
adgcdiagnose that we can use, as follows:
- Run Terminal and type:
/System/Library/Extensions/AppleGraphicsControl.kext/Contents/MacOS/AGDCDiagnose -a > ~/Documents/AGDCDiagnose.txt 2>&1
- This will create a file called AGDCDiagnose.txt in your Documents folder.
- Please upload this file. It will contain intense amounts of low-level detail that we can use to determine the real output resolution.
With one
DP-In connection, it is very likely that macOS is sending a 4096x2304 signal to the LG. The LG is then scaling it up to its native 5K resolution. Also see this post:
sorry the file is now attached the one drive connected to the SATA PCIe card are working fine.
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