Any thoughts on my issue? If not, hopes my post saves someone the time and money I spent getting different brand adapters for my USB.PLEASE NOTE: Customers are responsible for shipping and other associated costs with their returns unless the product is defective.Īll new products on the ViewSonic webstore carry a thirty (30) day money-back guarantee. Sadly, my only other high speed port is a FireWire 800, and I can’t find a single adapter to go from FW800 to VGA. Side note, the ports DO work for charging or external drives connected to USB, seems they only fail with transferring image data. My novice opinion is, the Catalina somehow improves the quality/quantity of the data going from computer to displays, and simply-the USB ports are now I’ll equipped to handle the data, therefore those ports aren’t gonna work for display. After researching a bit, I learned that the data capacities of the thunder/mini display is SIGNIFICANTLY more than USB. So, I went to buy new adapters, thinking it was a driver patch.that didn’t work either. When I rotated the other displays thru that port, they all worked. But, what was strange in my situation, one of my external monitors was working perfectly the one connected thru Thunder/mini-display port. I got a tech (GeekSq) to work on it, nothing.then they sent a tech out.again nothing.

Immediately after Catalina, 2 of my external displays stopped working, and as you said, aren’t even showing up as options. I have been running MacBook Pro with 3 external displays for over 4 years, with no problems.

But after updating both my MacBook Pros w the Catalina OS-same thing happened (sort of). Not sure if this adds anything to the discussion.I’m NOT a tech guy.

Vx2450 viewsonic drivers