VGA display not working with macOS Sierra

[wwatu]

Hi,

So I updated my existing El Capitan installation to macOS Sierra, all works well except the VGA monitor, I have it installed via DVI-VGA connector + another monitor with HDMI cable. Whether I boot it only with VGA monitor connected, or both connected, it reboots within loading up, and if i connect it while booted up and Detect Displays, it crashes and reboots.

Previously wit El Capitan it sometimes rebooted too within bootup, but most of the times it loaded fine with dual monitors. Now I dont seem to get it working, any ideas?

GPU - GTX 960
MB - Z97-M
CPU - 4690k

System definition iMac 14,2

 

[Adrian B]

OS X works best with a strictly digital only connections to any monitors. If you want to run dual monitors then get a second one with digital connections.

 

[wwatu]

Yes I'm aware of that, just wondering if there might be any option to get it working, since it worked in el capitan.

 

[Adrian B]

Are you using a passive or active adapter?
Apple have sold active mini displayport to VGA adapters to use with projectors. You can probably find a third party option available elsewhere that uses standard displayport. An active HDMI to VGA may work, but displayport would be my first choice as it has the best chance of working.
http://www.apple.com/shop/product/MB572Z/B/mini-displayport-to-vga-adapter?fnode=8b

I think that you may have been exceptionally lucky if you had VGA working with only a passive adapter in the part - one in a million long shot.

 

[Adrian B]

I am running Sierra with NVIDIA 9400GT card and as long as I start my computer with both monitors on (one via DVI and the other VGA) both monitors work.

You are very lucky to have an analogue and digital monitor connections running simultaneously from a single GPU. It does not happen often.

 

[hurikhan]

I am running Sierra with NVIDIA 9400GT card and as long as I start my computer with both monitors on (one via DVI and the other VGA) both monitors work.

What are your config.plist settings? How did you manage your graphics to work?

 

[Utamaru]

I can confirm that VGA monitor works in macOS Sierra with GTX 750.

What i have DVI and VGA monitor plugged, start the Hack, important that VGA has to be connected before start. On first boot i had panic, upon second boot the monitor worked.

What i have set was nvda_drv=1, kext-dev-mode=1

 

[slim.jim]

I can confirm that VGA monitor works in macOS Sierra with GTX 750.

What i have DVI and VGA monitor plugged, start the Hack, important that VGA has to be connected before start. On first boot i had panic, upon second boot the monitor worked.

What i have set was nvda_drv=1, kext-dev-mode=1

Neither of those boot flags do anything in Sierra

 

[Utamaru]

Neither of those boot flags do anything in Sierra

Then it just works if u plug it before start

 

[ravikhannan]

my motherboard doesn't have hdmi or d-sub port only vga present, can i use vga to HDMI signal converter for grtting output?