Hi,
for a kiosk project I’m trying to identify displays and set the screen 
arrangement to my needs.

This works well in cocoa/CoreGraphics with VendorID, ProductID and Serial 
number.
This works also well if I travers IORegistry for IODisplays.
But unfortunately sometimes I have similar displays without a serial number. 
Thus I cannot distinguish one display from another since their vendor and 
product ids are the same.

How do I resolve which IODisplay is on what port of the machine and how do I 
resolve the IODisplay from/to NSScreen ?

thx,
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