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Jeff Robinson · 05-30-2025, 01:18 PM

I have an M3 MacBook Air running MacOS 15.5 and the Pluggable UD-6950PDZ that uses the DisplayLink DL-6950 chipset. Prior to the latest Mac OS update an arrangement with a DisplayPort monitor in slot #1 and a HDMI monitor in slot #2 worked fine. With the 15.5 update the HDMI monitor registered as a monitor under Mac Settings but nothing was shown on the screen. Reboots, moving the monitor to slot #3 etc did nothing. The issue was resolved by using a DisplayPort to HDMI adapter in slot #2. Allows me to continue working but obviously here is a driver bug that needs to be fixed.

05-30-2025, 01:18 PM	#1
Jeff Robinson Junior Member Join Date: May 2025 Posts: 1	Observation and Bug with MacOS 15.5 I have an M3 MacBook Air running MacOS 15.5 and the Pluggable UD-6950PDZ that uses the DisplayLink DL-6950 chipset. Prior to the latest Mac OS update an arrangement with a DisplayPort monitor in slot #1 and a HDMI monitor in slot #2 worked fine. With the 15.5 update the HDMI monitor registered as a monitor under Mac Settings but nothing was shown on the screen. Reboots, moving the monitor to slot #3 etc did nothing. The issue was resolved by using a DisplayPort to HDMI adapter in slot #2. Allows me to continue working but obviously here is a driver bug that needs to be fixed.