Catalina 10.15.4, Mac OS Beta. Not working on 2015 Mac Pro

whytheheckdoesthisnotwork · 05-09-2020, 03:01 PM

My Mac (MacBook Pro 13in early 2015) is running Catalina 10.15.4 with the Mac OS Beta driver. I am trying to run 3 extended displays (2 external, 1 on my laptop). The external display connected to the HDMI port works as an extended display. I am using an adapter connected to my USB port to my second external monitor... this monitor shows black. All external monitors are recognized within 'displays' the only issue is this second external monitor just shows black... I

I've tried a few methods suggested on this forum with no luck... any new suggestions/solutions on how to fix?

whytheheckdoesthisnotwork · 05-09-2020, 03:55 PM

got this to work... just had to change the display settings on my blank external monitor

05-09-2020, 03:01 PM	#1
whytheheckdoesthisnotwork Junior Member Join Date: May 2020 Posts: 2	Catalina 10.15.4, Mac OS Beta. Not working on 2015 Mac Pro My Mac (MacBook Pro 13in early 2015) is running Catalina 10.15.4 with the Mac OS Beta driver. I am trying to run 3 extended displays (2 external, 1 on my laptop). The external display connected to the HDMI port works as an extended display. I am using an adapter connected to my USB port to my second external monitor... this monitor shows black. All external monitors are recognized within 'displays' the only issue is this second external monitor just shows black... I I've tried a few methods suggested on this forum with no luck... any new suggestions/solutions on how to fix?

05-09-2020, 03:55 PM	#2
whytheheckdoesthisnotwork Junior Member Join Date: May 2020 Posts: 2	got this to work... just had to change the display settings on my blank external monitor