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Nasty Surprise with Apple Software Update: NEC PA302W will no longer Work (UPDATE: how to fix it)

Back at home from a 7-week photo trip.

UPDATE: I had another OWC Thunderbolt 3 Dock on hand, which I swapped out—operation restored. The Mini DisplayPort maybe got fried by the PG&E outage? Or maybe it’s just bad physically, as it seems loose and sloppy. At any rate, swapping the dock fixed the problem.

Update 2: it seems that the Dock which drives the display has one bad Thunderbolt 3 port. Or my LaCie Bolt is toast. It’s all very confusing.

UPDATE 3 — SOLUTION: a suggestion OWC: remove power from all devices (unplug), wait a bit and reboot. I’ll be damned—this cured the dead Thunderbolt 3 port and the display works too! Having to unplug stuff from the wall to make it function is just insanely bad, but I don’t know who/what is at fault except that macOS updates seem to have been making all this worse and worse, so Apple is the whipping boy at present.

.... original post below...

On my trip, I inadvertantly installed the latest Apple security update for macOS Mojave (I have not “upgraded” to macOS Catalina, and I don’t plan to for some time, as it will hit me with at least $500 in upgrade costs for various software.

What I did NOT expect is that the latest Apple macOS Mojave update would destroy connectivity to my NEC PA302W, my workhorse display.

I just cannot get the PA302W to work; the PA302W just says "no signal". This after years of bulletproof operation.

The cabling has not changed, it just sat there while I was away: a DisplayPort cable connects the NEC PA302W to the Mini DisplayPort port on the OWC Thunderbolt 3 Dock. This stuff just sat there for 7 weeks, untouched. It no longer works. The only meaningful change was the Apple software update.

Perhaps it is some problem caused by the Apple update that makes the OWC Thunderbolt 3 Dock fail to drive the display now? Or something more basic. But with only two Thunderbolt 3 ports on my 2019 iMac 5K, I have no other options.

This is the worst Apple problem ever. I don’t know what I’m going to do if I cannot get the PA302W to function.

NEC PA302W 30-inch wide-gamut display
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