System Update reboots to "No Entry" symbol on blank screen

[ajmichmac]

iMac Pro 2017 -- Running the system update to get the 10.14.3 upgrade, it downloaded the file then when the update was started it rebooted the system, only to see a "No Entry" symbol (slashed circle) centered on a blank screen. Nothing to click on, and keystrokes did nothing. Powered down and restarted. Anyone ever seen that symbol before...? It has never appeared before.

 

[SecuritySteve]

So that's what happens when there is an issue with the OS installation, or EFI boot process. You had a bad update. Did you have a backup of your system you can restore to? (Assuming you didn't find a way to get back in)

 

[ajmichmac]

So that's what happens when there is an issue with the OS installation, or EFI boot process. You had a bad update. Did you have a backup of your system you can restore to? (Assuming you didn't find a way to get back in)

Well, I did get back in without any hassle, just shut down for a minute and restarted and it booted normally. But I'd never seen that slashed zero symbol before, that's ALL that was on the screen, no text and no buttons or options.

 

[SecuritySteve]

Well, I did get back in without any hassle, just shut down for a minute and restarted and it booted normally. But I'd never seen that slashed zero symbol before, that's ALL that was on the screen, no text and no buttons or options.

This guy right?

He's popular in the hackintosh forum.

In any case, congratulations on getting in.

 

[ajmichmac]

This guy right?

He's popular in the hackintosh forum.

In any case, congratulations on getting in.

Yep, that's it all right. Strange thing, not having any message on it or options available.

 

[nambuccaheadsau]

Is the Profiler showing as OSX.14.3?

 

[ajmichmac]

Is the Profiler showing as OSX.14.3?

Yes... well, it WAS -- but since updating to the latest built 10.14.3 I've had nothing but trouble... crashes, freezes, mouse not working all the time, etc. So I have downgraded to 10.14.2 and so far it seems stable again.