Mini DisplayPort to VGA Adapter won't work on thunderbolt port

By any chance were you using a VGA->DVI adapter when trying to use the Mini-DisplayPort->VGA adapter? As in Mini-DisplayPort->VGA->DVI?

I had trouble with this. I found going straight to Mini-DisplayPort->VGA or Mini-DisplayPort->DVI worked perfectly but once I added a VGA->DVI or DVI->VGA adapter to the chain the screen would be detected by OS X but the monitor itself would give the "No signal detected" message. I tried all these combinations on the same monitor.

Not sure if it helps your situation but I have noticed some similar issues.

EDIT: Oh, and I have the new MacBook Pro 15inch with Retina all fully updated. I noticed that with my late-2009 White Macbook didn't have this issue with the cables and adapters.

I also have this problem. But my Mac is Macbook Air 2012 13' with Intel HD Graphics 4000.

Is the adapter you are using an Apple adapter or some other brand? I had problems with another brand and when I switched to the Apple brand the problem went away.

same here. new mba 13". tried with two projectors and didnt work. seems a problem with the refresh rate...

nmartinscampos wrote:

same here. new mba 13". tried with two projectors and didnt work. seems a problem with the refresh rate...

And what refresh rate does your projector require?

Hi my problem was fixed after update the driver from

http://support.apple.com/kb/DL1551

Hope your problem will fix.

Thank

Do you of a driver for MacBook Pro? The above link was for MacBook Air. I am having the same exact problem.

Here's the update that might fix it for mid 2012 MacBook Pros:

http://support.apple.com/kb/DL1542

That update fixed the issue on my 2012 MacBook Pro. Thanks.

I have a new 2012 (June) MacBookPro running 10.7.4 with a 2.5 GHz Intel i5 processor. Graphics Intel HD Graphics 4000 512 MB.

I'm trying to connect a Toshiba flat screen TV to the computer via a mini display port to VGA adapter purchased from Apple with the computer. I can get the screen to show on the TV by changing resolutions and refresh rates (1280 x 768 at 60Hz) but the TV shows 5 partial screens on my laptop screen. I feel like I'm looking at the beginnings of an abstract art piece.

All software is up to date.

Any advice would be appreciated.

abusch38 wrote:

I have a new 2012 (June) MacBookPro running 10.7.4 with a 2.5 GHz Intel i5 processor. Graphics Intel HD Graphics 4000 512 MB.

I'm trying to connect a Toshiba flat screen TV to the computer via a mini display port to VGA adapter purchased from Apple with the computer. I can get the screen to show on the TV by changing resolutions and refresh rates (1280 x 768 at 60Hz) but the TV shows 5 partial screens on my laptop screen. I feel like I'm looking at the beginnings of an abstract art piece.

All software is up to date.

Any advice would be appreciated.

Use HDMI (if your TV has it) or DVI, not VGA.

Csound1,

Thanks for the reply. However, I'm having the same issue with my digital projector at work (which only uses VGA). I'd prefer to not buy multiple adapters that may or may not work when the one I have from apple does not work. Granted, most likely this is a bug in OS X 10.7.4, but the patches I've downloaded have done nothing to fix the problem.

Called Apple Support and they solved my issue.

1) Restart the computer in Safe Mode with display attached (shut down and restart while holding down shift key).

The display showed up without distortion.

2) Change the display to my desired preferences (dimensions and refresh rate).

3) Restart computer. ...and it works like a charm.

Vioala!

As usual you you have to jump through a bunch of hoops to get somethng to work on the Most Advanced Operating System in the World. Go figure.

Glad you got it figured out.

Now if Apple would just make thing like this work without the hoops instead of making a Desktop OS like a Phone OS.