Discussion on installing Mac OS System on HP elitedesk 800 G5 GM GPU rx560 mini model! imac19.1

Specific configuration:
CPU i5 9500t
16GB memory
Rx5604g has only one DP output
Cannot change to imac19.1. After entering the system, the screen is black.
You can only access the desktop by screen sharing. At this time, the display has output, but it does not display the desktop, and it is not a standby posture.
It has been discussed here.
Is it possible to solve this problem by customizing the output port of the graphics card
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