10.15.6 - Non-functional with 5.2.4

LittleSepDude · 08-21-2020, 07:41 PM

I have a user with an iO dock. As soon as he upgraded from 10.15.5 to 10.15.6, his external monitor no longer worked. Everything else connected to the dock works, including Ethernet and charging.
When the external monitor is connected to the dock, the system freaks out and BOTH the macbook and external monitor go black as if the system cannot figure out which screen to use. When connecting the external monitor with an Apple display adapter directly to the macbook, the external monitor works just as it did prior to 10.15.6 and the laptop screen works as well.
Any suggestions?

08-21-2020, 07:41 PM	#17
LittleSepDude Junior Member Join Date: Aug 2020 Posts: 1	Same issue as cgg1323 I have a user with an iO dock. As soon as he upgraded from 10.15.5 to 10.15.6, his external monitor no longer worked. Everything else connected to the dock works, including Ethernet and charging. When the external monitor is connected to the dock, the system freaks out and BOTH the macbook and external monitor go black as if the system cannot figure out which screen to use. When connecting the external monitor with an Apple display adapter directly to the macbook, the external monitor works just as it did prior to 10.15.6 and the laptop screen works as well. Any suggestions?

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