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Hessel78 Author

Level 1

1 points

Second display problem with 10.9.4

After installing Mavericks 10.9.4 my second display stop working, does not detect external display anymore, I even try the "Detect Display". I downloaded and install the 10.9.4 Combo update, it doesn't work, try a clean install of OS X Mavericks but nothing working to solve this problem. I try downgrade with my time machine but the restore process take about 25 hours to finish connecting via Ethernet cable, and I can't wait that long... 😟 Someone are experience the same problem I have with this update?

My computer specs:

Processor 2.5 GHz Intel Core i5

Memory 4 GB 1333 MHz DDR3

Graphics AMD Radeon HD 6750M 512 MB

Capacity: 500GB

I just have one thunderbolt on my iMac. And I have the cable with thunderbolt to HDMI.

Posted on Jul 2, 2014 4:11 PM

95 replies

Jun 5, 2015 8:20 PM in response to shinsundo

Still not working, it's a Shame😠

rfguy1

Level 1

0 points

Jun 15, 2015 6:12 AM in response to zaonamiddia

I too inherited this external monitor feature since upgrading. What a shame. From exploding batteries, faulty graphic cards (MacBookPro's) to this - 2nd Monitor issues. really?. My guess is you couldn't find a way to make extra money from us using a generic external monitor so why bother encouraging us to do it. Well, in my book 3 strikes your out. After 20 + years I have had it. I bought an Android phone and Samsung tablet because I can add memory @ a reasonable cost, replace my own battery is needed and I don't need ANY special cables. Did I mention combined they all cost less then the price of 1 iPhone 6? Oh, with the additional savings I'll be shopping for a PC. It REALLY is a sad sad outcome to a once great organization. Does corporate even read the replies Customer Service sends to us in response to our valid requests for assistance? Oh, BTW, my iPhone 5S is making a decent MP3 Player as long as I keep it plugged in and disconnected from iCloud because the battery is dying and I don't want Apple wiping my original music library clean like you did to so many others.

Jul 20, 2015 10:45 AM in response to altoronto

I tried Altoronto's solution but it didn't work for me.

For the record I have a MacBook Pro, Mini DisplayPort/Thunderbolt -> DVI adaptor and a Samsung monitor.

I've tried: deleting *windowserver* plists in all Preferences folders, I've tried disabling kext restrictions, I've tried resetting NVRAM, I've tried deleting private/var/db/displaypolicyd, I've tried unplugging and replugging the monitor, etc.

Nothing has worked.

Jul 20, 2015 12:00 PM in response to Ethan Duckworth

we got ours working again by using the HDMI output of the card instead of mini dvi and buying an HDMI > DVI-I cable to connect to monitor. Hope this helps someone...

Jul 24, 2015 7:15 AM in response to Hessel78

I finally got it working. Based on a vaguely related discussion https://discussions.apple.com/thread/6623697 I tried the following steps

Apparently, I needed to reset the SMC before resetting the PRAM/NVRAM. Here are the steps that I did, who knows how many matter

(1) Disconnect External Monitor.

(2) Restart in Safe Mode

(3) In Safe Mode, repair permissions.

(4) Shut Down, reset SMC

(5) Once computer boots from SMC reset, restart again and reset

PRAM/NVRAM.

So far (72 hours) it's worked pretty well.

Second display problem with 10.9.4