10.9.3 kills third monitor

I had been testing through the beta and saw these issues and reported it. They shipped it still broken. I have a case with applecare open since yesterday and pointed to all the info I posted during beta. I am suppose to here back on Monday. I yold apple this is very unacceptable since they new the issue existed.

10.9.3 killed my second monitor (Dell U2412M)

Now I can only boot into one or the other (Primary is a 27" LED Apple Display)

How did you revert back the prior 10.9.2 ?

Only if you have the Mavericks install package for an earlier version. You should also be able to restore from a Time Machine Backup if you have not backed up since installing 10.9.3 and you are making a complete backup.

I'm now restoring from Backup (9 hours?)😠

It takes a restart to Grey Screen then Cmd R and restore from backup.

Eithernet connection to the latest time capsule and a Mac Pro Late 2013 64gigs of RAM and it still takes 9 hours...

O'well. Working from the Laptop today.

The 10.9.3 update disabled my second monitor as well, on my 2008 Mac Pro. It was just fine in 10.9.2.

I have another internal drive that still has a bare-bones 10.9 system; I can boot from that, and the second monitor comes back on, as happy as can be. That's not a solution, though - I have to boot from the primary drive to get anything done at all.

Very frustrating.

Update killed DUAL monitor support for my MacPro 2008 as well. What the **** Apple.

the same problem here!!!! after installing 10.9.3, only 2 of 3 monitors working on mac pro (2013)! installed 10.9.2 on new partition and all 3 displays worked again. updated freshly installed 10.9.2 to 10.9.3 and problem occurs again! PLEASE FIX THIS APPLE!!!!!!

Im have this same problem nMP 2013 2xD500...

2 from 3 monitors only working...

I have three 1080p or less monitors:

- mini display port to display port

- HDMI

- mini display port to DVI

All three still work with 10.9.3

hi,

am using 2 dell 1920x1200 displays thru adapters minidisplay-DVI on latest mac pro ashtray. have given up on using my LG TV monitor as third monitor already.

after 10.9.3, both dells still work fine. so no prob here.

I too have the problem. So far none of the fixes work. Apple? It would be REALLY nice to fix this bug very quickly.

I have been an avid Apple user and fan since before the original Mac but I do have to say that lately Apple is getting sloppier and sloppier with every release.

To everyone who hasn't seen this -

gatd4

down load kext utility here http://mac.softpedia.com/get/System-Utilities/Kext-Utility.shtml

download Kexts here https://www.dropbox.com/s/a510p6a9immdboc/Kexts.zip

unzip the file

delete all Geforce and NVDA kexts located in your system/library/extensions

open kext utility and drop the all the kext files you downloaded on the window

wait till complete

reboot

now all monitors working again!

*****

gatd4's solution worked perfectly for me! It might not work for non-NVDIA Macs, but it worked on my 2008 Mac Pro. Thank goodness - good luck!

And those with MacPro's who have ATI cards?

Hopefully Apple Engineers sort this issue but us Desktop developers and users are second place to the moble users. We are but beta testers for releases that used to be solid.

Again, "Hopefully" this gets sorts soon or that Apple OS programers are aware of the problem.

The backup solution for me personally created a very unstable environment. I had to go back and take the upgrade and lose the second monitor... 😟