Mid 2012 Pro external VGA Display corrupt?

I received my shiny new 13" macbook pro today and bought a mini displayport to vga connector from a local store. Unofrtunately my external display of choice shows some strange images when connected. It shows the desktop but divided into several shifted. Can't really describe it but i would say the screen is 1000 pixels wide it show them in the following order: 1-100;300-600;800-1000;800-1000;800-1000;
I installed the last update and i'm going to try it with another display tomorrorw. My old 2007 Macbook made no problems with the display when connected over VGA.
Any Ideas?

Hi, I am experiencing very similar issues and have been discussing with Apple the problem. Please could you try something:
Shut down your computer. Then, connect the Display port to VGA addapter, book up and try again (don't forget to detect display if needed). Does this solve your problem? If so, I think there is a bug that I need to report on. It would be helpful to determine whether this solution only works for me!
Thanks
Danny

Similar Messages

Imac does not detect external vga display

Please help with connecting external vga display to an imac 21.5'', late 2012, OS X 10.8.5 via Mini DisplayPort to VGA adapter.
I have connected an external monitor (Fujitsu Siemens) to the thunderbolt port of the imac using a Mini DisplayPort to VGA adapter. The imac does not detect the external monitor. I have followed all instructions and suggestions I could find at Apple Support Communities without success.
The monitor is in perfectly good working order as it has no problem connecting and performing flawlessly with a dell windows laptop. The imac, connected via the Mini DisplayPort to VGA adapter to the D-Sub connector of a Samsung smart TV, also worked perfectly.
To add insult to injury, occasionally, when restarting the iMac with the external vga display connected and powered on, the iMac screen starts intermittently turning blue for a brief second or so and resuming back to normal. The frequency of 'blueing' is once in 2-3 seconds. This particular rather disturbing problem, luckily ceases when the external display is switched off.
Any advice and help with resolving the above connection problems will be gratefully appreciated.
Thank you
ghogoh

I am having the same issue. Hope Apple can fix this soon!!!

HT5219 I have a macbook air (mid 2012) and a thunderbolt display. Do I absolutely need to connect the power supply together with the thunderbolt cable ? I found that the screen won't wake up if only the thunderbolt connection is plugged.

I have a macbook air (mid 2012) and a thunderbolt display (27'').
Do I absolutely need to connect the power supply together with the thunderbolt cable ?
I found that the screen won't wake up if only the thunderbolt connection is plugged. Is this normal ?

I just got my ATD and late 2011 MBP up and running. I've not tried running without the power adapter from the ATD plugged in, but I just tried and didn't have any problems with the display not waking. You may want to take your query to the ATD forum - https://discussions.apple.com/community/peripherals/thunderbolt_display - perhaps someone there has experienced a similar issue.
Good luck,
Clinton

My non retina macbook pro mid 2012 will read the display its connected to but does not display anything at all

Hi there,
I have a macbook pro mid 2012 non retina display and i tried using an external display for it. I hooked it up and the screen blacked out and turned back on like normal and the computer itself was reading that the display was there. The only problem is that on the display itself there is no image of the macbook being displayed. im using a thunderbolt to vga connector and all the connection check out the only problem is the display. the display works on my other macbook that i have just fine i dont understand why it wouldnt work on this new one. Keep in mind i have had this computer for only 5 days.
Thanks in Advance

Hi, cubingcouple.
Thank you for visiting Apple Support Communities.
I understand that your MacBook is not working with your external display. display shows a blank screen. Here is the best troubleshooting resource to go through when experiencing these symptoms.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT201177
Cheers,
Jason H.

Is there a way to connect 1 external thunderbolt display and 1 external HDMI display to a mid 2012 MBP (non-retina display)?

I've had a 24" Asus HDMI montitor for a while, and just got a 27" Apple thunderbolt display. I was wondering if there was a way to connect both of these to my mid-2012 Macbook Pro (non-retina). I know you can daisy-chain 2 thunderbolt displays, so I tried plugging my Asus into the thunderbolt display (using an HDMI to mini-display port adapter) and it didn't work. Suggestions??

Mini DisplayPort displays and adapters don't work directly with a Thunderbolt display, but will if you connect a Thunderbolt disk drive (with two Thunderbolt ports) between the Thunderbolt display and the Mini DisplayPort device.

MacBook Pro 13 inch mid 2012 Mini DisplayPort VGA Not Working

I am using a 3rd party adapter that has worked a couple of times but now when I try to use it my computer freezes up until I unplug the adapter. My 3rd party DVI adapter works fine and the VGA adapter works with my windows 8 partition (used it tonight for my presentation, how sad, bought a Mac and had to use windows still).
I have ML 10.8.2
Please help, I need this to run my presentations

I've seen a number of posts here recently about Thunderbolt/Mini Display Port to VGA adapters not working. It just seems as if Mountain Lion doesn't function well with VGA any longer. The only thing that I can suggest is to continue to use the DVI port if it works.
Clinton

MBP not connecting to external VGA display

Hello everyone,
I have an issue with my MBP (13", Mid 2009) and my external monitor (Samsung SyncMaster 2343NW).
I'm connecting the display using a simple Mini DisplayPort to VGA adapter.
The problem is that it is not a consistent issue. Sometimes it works, sometimes it doesn't.
I set up the external monitor as the main one (when it is connected), but since the very beginning I did this, I had problems setting the screen resolution. Sometimes it recognised the optimal resolution and used it, but sometimes it did not, it used something like 1024x768 and I can't set the appropriate resolution in the Preferences Panel since it is not available.
Some of the latest times I tried to connect the display I tried to wake up my Mac with the lid closed (using a usb keyboard to wake it up) to force it to try and connect to the display. But now even this "trick" does not do anything (the Mac just wakes up and lightens its own display, even if the lid is closed).
Also, when I connect the VGA cable to my adapter, the monitor turns from its "no signal" message to a black screen, while when I connect the adapter to my MacBook, it does not react in any way (does not show the typical "light blue screen" that usually says *I'm connecting to some external display, wait a second*)
I also have another Mini DisplayPort to HDMI that I use to connect to other peripherals, and it works fine..
Also, the monitor works fine on another PC.
So.. I can't understand what's going on!
Whay would you suggest?

Hi,
HDMI to VGA cable won't work, you need a converter to convert from digital to analog. The following device is one example:
http://www.jaycar.com.au/productView.asp?ID=AC1638
Regards.
BH
**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

Connecting external VGA displays

I am attempting to connect two external displays to my 15" early 2011 macbook pro. One is a Dell monitor and the other is a Hanns-G. Both are pretty old and only have VGA ports, but I know for a fact both the monitors work because I was using them on my old desktop. I already own a rocketfish mini displayport to DVI adapter so what I did was I purchased a male DVI-I to 2x VGA splitter. So basically the setup starting from my macbook pro would be mini displayport>DVI>DVI-I splitter>2xVGA monitors. For some reason when I use this set-up though, the monitors do not connect and instantly go into sleep mode. I've tried going into display preferences and detecting displays, but no luck.
Here's where things are odd. I tried on my friend's monitor, an HP with DVI and VGA ports, to connect the DVI directly to my DVI>mini displayport adapter. That works fine. But when I try to connect through the VGA port on the monitor using a VGA to DVI adapter, and then DVI to mini displayport, the monitor instantly enters "sleep" mode when I plug the mini displayport end into my macbook pro. Since all three monitors entered sleep mode, what I'm assuming is that the right signals are not being converted between VGA and DVI, or something along those lines. Is it even possible to use a splitter cable with the DVI to mini displayport adapter? The signal must be getting screwed up somewhere along the way. But then again, I have no idea. If anyone has any ideas, or any settings I could fool around with on my macbook, it'd be much appreciated!

Hi,
HDMI to VGA cable won't work, you need a converter to convert from digital to analog. The following device is one example:
http://www.jaycar.com.au/productView.asp?ID=AC1638
Regards.
BH
**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

MacBook Pro -- external hard drive corruption -- AND hanging computer?

Since purchasing a 17" MacBook Pro, I've had serious problems with directory corruption on three of my external firewire hard drives (80 and 100 G FireLite Pocket drives and a 400 G Lacie drive). About 2 weeks ago, the 80 G drive (with most of my critical files) disappeared from the desktop. Disk Utilities returned with a message that it was repairable. Tech Tools supposedly fixed it, but the drive icon shortly disappeared from the desktop. This time, Disk Utilities "repaired" it, but it was the kiss of death. After this, plugging in the drive caused the computer to hang indefinitely. I could no longer run any repair or data rescue software. Once this problem occurs, I can switch firewire cables and computers, and the computers still crash/hang. A techy at work managed to rescue the files and replace them on the disk (this required other hardware, a PC, and some software he downloaded(?)). Two weeks later, the problem happened again. However, this time, it was the 80 G and my 400 G backup drive. Now, all of my originals and backups (for the past 2 years, since I did my last CD/DVD backups) are (hopefully) temporarily unavailable. My 100 G drive started to do the same thing. However, I purchased and downloaded a copy of Disk Warrior, which seems to have rescued this disk.
I've had these drive for between 3 and 5 years, with little or absolutely no trouble. Then, after getting the MacBook Pro, I'm encountering really serious problems.
Is the MacBook Pro at fault? (I've returned to my PowerBook G4 until this issue is resolve).
What causes such severe disk directory damage that causes my computer to hang?
How can I recover my files (critically important to my work, some of which is on a tight deadline) without having to run to the vastly overworked/underpaid techy in my place of employment)?
My conversation with an Apple Tech was much less than satisfying. In fact, he seemed to portray a state of denial about the MacBook Pro having any problems, even though the web is full of complaints. What's up Apple? Are you beginning to backslide yet again?

Welcome To Discussions JeffBloom!
I'm sorry to hear that you are having problems with your MBP, but you have posted your inquiry, in the Discussions Forum, that is intended for discourse about the use of Apple Discussions.
You will get more focused attention to your issue, if you select a more appropriate location from this page Discussions Forum Home.
For example,
From the Forum Home Page, select the Category MacBook Pro.
Then choose an appropriate MBP Forum, such as Using your MacBook Pro.
On Forum pages, there is an option to Post New Topic.
Good Luck!
ali b

New MacBook connected to external VGA display screen flash.

Just got the 2.4Ghz yesterday. For home use I've got it connected to a Samsung SyncMaster 2032NW display via the Mini DisplayPort to VGA Adapter. Occasionally the display will go dark for a half-a-second or so and then come back on. It happens randomly, not for hours sometimes and sometimes multiple times over a shorter period of time. There does not seem to be any repeatable action that causes it to happen, it appears to be completely random. This does not happen when I'm using the built-in screen. And I didn't have any problems using the Samsung display with my older MacBook.
Should I take the computer back? Is there something I can do to check the hardware for issues?

Glad that I am not the only one have this problem
Got the latest macbook aluminum yesterday and hook up to my Dell 24" monitor (2407WFP-HC, 1920x1200 resolution) through mini-displayport to VGA adapter. I also kept macbook lid closed and plugged in the USB keyboard/mouse; so that I can use the external monitor as the only screen. The monitor randomly goes black with a message saying "Entering power save" and then after a second comes back fine.
I am not sure but I feel it happens more when I open new windows, although there are times it happens while I was doing nothing than reading a web page. There is no problem with using the built-in display without external monitor.
Any help would be appreciated!
Message was edited by: duancg

Is there a program that finds hardware and OS problems?mid-2012 pro

What about spywear?... my answering machine turned on then router was accessable to my laptop!!!! I now keep the mac router unplugged when not in use.
Also, the 10.4.11 pro USB out to a perifferial microprocessor (arduino uno R3) has stopped communicating in either USB port How can I check to see if it works. Both USB ports r/w to flash drives. So what to do now?

I've never actually done this, but don't think it will work for the purpose of running a task in a regular app like Synk Pro. Launching Synk Pro - even, I would think, from a logout script - will cancel logout. Of course, if Ham1000 is willing and able, he could probably replace Synk Pro with a call to rsync from a logout script:
http://www.bananica.com/Geek-Stuff/Synchronize-two-folders-on-a-Mac-with-Rsync/
Interesting idea...

Can I use my Mid 2012 13" MacBook Pro to drive two displays?

I have a Mid 2012 13" MacBook Pro (NOT Retina - I wanted the optical drive...) connected to a 27" Thunderbolt Display. If I get a MiniDisplay Port <-> MiniDisplay Port Cable (and connect it between the Thunderbolt Port on the Thunderbolt Display, and the MiniDisplay Port on the iMac), will the MacBook Pro also be able to drive my 27" Mid 2010 iMac as an external Monitor?
If not, will the iMac be able to drive the Thunderbolt display?
I'm trying to get to documents side by side on the 27" monitor so I can move data between them - Word/Word, Word/Excel, etc.,
It would be nice to know the answer before I go to the store and drop the $ on the cable...
Many thanks,
Chris

After lots of reading, it seems it is possible (thanks for the link, OGELTHORPE), but I haven't been able to figure out the right cable configuration.
Confirmed my MacBook Pro (mid 2012) supports two Thunderbolt Displays
Confirmed my iMac (mid 2010) supports Target Display Mode
Confirmed this is possible based on the below...
6. Can I use an Apple Thunderbolt Display and an iMac in Target Display Mode to act as two additional displays for my Thunderbolt-equipped Mac?
Yes. If your Thunderbolt-equipped Mac supports two Thunderbolt displays this is possible. Your Thunderbolt-equipped Mac will need to be connected to your Apple Thunderbolt display and the iMac will need to be connected to the Thunderbolt port of the Apple Thunderbolt display. Not all iMacs support Target Display Mode. See Target Display Mode: Frequently Asked Questions (FAQ) for more information. Once connected, place the iMac into Target Display Mode to enable it as the second external display.
Notes:
Make sure the Thunderbolt Display is connected to your Thunderbolt-equipped Mac and is being recognized and used by the Thunderbolt-equipped Mac before connecting the iMac to the Thunderbolt display.
If the iMac is placed in the Thunderbolt chain before the Apple Thunderbolt Display, the Thunderbolt display will work as an external display for the iMac and it will stay active as an external display for the iMac, but it will not function with the main Thunderbolt-equipped Mac using the iMac's display.
To use an iMac in Target Display Mode when connected to an Apple Thunderbolt Display, the iMac must be Thunderbolt-enabled, and a Thunderbolt cable must be used (not a mini-DP cable).
The bulletpoint that worries me is the last one. I have tried with both a mini display port cable AND a thunderbolt cable, but the last bulletpoint seems to suggest that this is not possible if the iMac is NOT a Thunderbolt enabled iMac (which mine isn't). It does however say elsewhere that my iMac acting in TDM mode acts as a Thunderbolt Display, so it's all a bit confusing!!! It seems that my MacBook Pro can't drive both displays; so now I'm trying to figure out how to get the iMac to treat my Thunderbolt display as a second monitor.
Fingers crossed...

Macbook Pro incorrectly 'sees' external vga mirrored monitor while booting

So I've experiencing some new behavior with my Core Duo Macbook Pro. The past few days it has boot up with no login window. The background is the 'normal' Leopard star scene. If I press 'apple-F7', I do get a screen switch that shows a login window in normal vga resolution.
Once I get in, the display system prefs automatically comes up and wants to adjust the resolution down further. I thought it odd that it thought there were two displays connected, the machine's LCD and an external VGA and it is trying to mirror the two. When I turn off mirroring, I lose all of the system preferences as it seems the non-existent VGA screen has the title bar. I then need to do a 'detect display' and it will correctly re-adjust back to the single display.
This first started when it came out of sleep mode a few days ago and is now booting up fairly consistently with this phantom external VGA monitor. I've even had System Profiler show two different displays (LCD and VGA) prior to redetecting displays.
My question is: Why is this computer seeing an external VGA display when I have NOTHING plugged into the DVI port? I've never plugged anything into it since my 'fresh' install of Leopard. I've had the machine into the Apple store for a failing microphone (which was not fixed yet because they wanted to send it in). During the Apple store visit, they did reset the PRAM.
I'm really perplexed and getting annoyed at window flipping/adjusting in order to get logged in.
Anyone?

Stackhouse wrote:
Could a defective card cause the performance issues I had, but seemingly only when I have an external monitor connected?
Yes. Contact Apple using the links in the kbase article you mention.

MBP shows VGA display, but none connected

I am facing a quite strange problem. My MBP shows an external VGA display but there is none connected. I can see it in the display preferences. I already checked the hardware but there is nothing wrong with it. I connected a real display via dvi to vga and it works fine. Anyone who knows this problem and knows what to do about it?

Found a possible solution.
Do you have bootcamp installed?
I restarted into windows xp and checked my nvidia settings and made it was set to "Use One Monitor"
Then restarted and Voila!
Hope it can help

My Macbook Pro (Mid-2012) won't connect to an external display using my MiniDP to VGA Cable.

I'm on a Macbook Pro (Mid-2012) on Mac OS X 10.8.3 (currently downloading the update to 8.4). When I plug in my Mini Displayport to VGA adapter to my Mac, the screen flickers blue for a second and the Display Settings window detects the other monitor and allows me to rearrange the screen, but it does not project anything onto the other monitor. However, I tried connecting an Apple Thunderbolt Monitor to this computer today, and it worked. This wasn't a problem before, as I was able to connect this Mac to other LCD projects before. Furthermore, I don't think it's an issue with the adapter either because it's relatively new. I also tried plugging in the adapter of another Mac (which was working fine) into my Mac, but it didn't work either.
Here's what I've tried:
1. Restarting the computer with everything plugged in
2. Pressing Command + F1 when it's plugged
Any advice would be helpful!

Hi lancekatigbak,
If you're having issues with the display out on your MacBook Pro, you may want to take a look at the troubleshooting steps in the following article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Cheers,
- Brenden

Mid 2012 Pro external VGA Display corrupt?

Similar Messages

Maybe you are looking for