MacBook Pro 10.8.2 stopped detecting external Samsung monitor

Hello,
My MacBook Pro stopped recognizing my extenal monitor that I use as an extended desktop. I plugged the same monitor into my old machine and it worked fine so I know it's not the monitor. I reset the PRAM and ran disk utilities to repair disk permissions and that didn't help. I have tried every combination of plugging and unplugging the devices I can think of. I am pretty sure the cause if this is a system software update and not the hardware.
Any suggestions?
Thank you!

Crap, same thing here, I used to be able to connect my MBP Late 2008 to Philips hdtv with no problem using Snow Leopard, but as soon as I upgraded to Lion it wouldn't work. I was waiting for Mountain Lion to come out and upgraded hoping for the feature to work again but no success. Money spent on cables are being wasted. Any fix soon to sort it out?

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How to get new Macbook Pro Retina (late 2013) to detect external monitor via HDMI?

Hi everyone, this is my first Mac and for the most part it's been really, really wonderful.
This is my first major glitch: I cannot get it to detect my external display: It is an ASUS PA248Q, manufactured Aug 2012.
The HDMI cable according to my Amazon history is at least 1.3c from 2010, "Fanatic Digital Imperial Series Gold-Plated HDMI Cable (6 feet)".
It works with perfectly connecting an AmazonTV box to an old Samsung TV, with vivid clarity, unlike our cableTV signal.
Just in case, I have a new HDMI cable on order, which claims to be of newest standards.
The Macbook Pro Retina (late 2013) has the standard Intel Iris from the Haswell chips, as well as Nvidia GT 750M, the latter which I don't think has been used yet.
The ASUS display says: HDMI NO SIGNAL.
I have tried shutting them down and replugging the cable. I don't know what the ideal order is. The Macbook Pro is plugged into AC power, as suggested.
In System Preferences>Display, I press the Option key to select "Detect Displays" option (seriously unintuitive).
I have also tried resetting the NVRAM:
I shut the machine down. Pressed the power button, then quickly held the quadruplet: Option-Command-P-R (a double handful) and waited for the machine to chime a 2nd time. Tried to detect external display no luck.
Next, I reset the SMC:
I shut the machine down. Then I pressed Shift-Control-Option-Power for about 5 to 10s. Then I turned on the machine normally.
NVRAM & SMC steps were from an old youtube video, as the instructions I had did not explain how to do so clearly.
Please let me know if I"m doing something wrong.
Seems so exorbitant to pay $350 for Apple Care; that's a the cost for a whole new cheap laptop.
I will search the forums again. If anyone answers this, thank so much!

Hello there, willr314.
It sounds like you've covered most of the practical steps found in this Knowledge Base article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573#1
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
The article does offer some additional links and recommendations as well:
These articles may offer additional assistance and information about displays and video adapters:
Apple Portables: How to use your computer in closed lid mode with an external display
Apple Cinema Display (30-inch DVI) has 1280 x 800 as the maximum available resolution
Mac Pro (Early 2009), Mac Pro (Mid 2010): Supported display configurations
For assistance with Retina displays, please see Frequently asked questions about using a Retina display.
If you tried all of these steps for your display and the video issues persist, contact Apple technical support or take your Apple computer to the nearest Apple Store or Apple Authorized Service Provider (AASP) for diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).
Note: Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

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I bought mini-DP to DVI frome Apple several monthes ago and it worked well in that time until yesterday the external monitor show me no signal sign. Other PCs were connected with the same cable and monitor and they are fine. I am wondering there is something wrong in the adaptor or macbook pro. Furthermore I found the external monitor can display nornally when I switched to 9400 graphic card and used mini-DP to VGA adapter. If I switch to 9600GT no signal again. If I switch 9400 using mini-DVI, it is shown on the external screening: Out of range... In a word, In the mode of 9600GT, mac can not recognise external monitor(I can not detect it in the systerm preference even I press detect display buttun) and 9400 works in VGA mode. However when I connect adapter to mac, the screen showed blue flash.
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I turns out that the logic board of my MacBook Pro was faulty (despite being brand new).
I took it to the Apple Store, presented the problem, and one of the Tech's came to the same conclusion that I had -- hardware failure. Phone support was no help in the matter (and even told me that what I was trying to do wasn't a supported option, which is rediculous). However, the Genius Bar did take care of the problem, and my MacBook Pro was back to me with a replaced logic board within a few days.
Hope that htis helps.

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I just got a new macbook pro (my other one stopped working). I am trying to sync the music on my iphone to my new mac's itunes library. I've clicked sync in iTunes but it doesnt work. how can i do this? I don't want it to delete everything from my phone or old computer.

hstarkeyy wrote:
I don't want it to delete everything from my phone or old computer.
You don't need to delete anything from your phone or you old computer.
Copy the entire /Music/iTunes/ folder from old computer or backup to /Music/ on new computer.
If you cannot use the old computer or don't have a backup...
-> Recovering your iTunes library from your iPod or iOS device
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Get an external drive and plug it in and use -> Time Machine

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Hi there,
I just bought a Samsung SE-208DB external drive for my 2011 Macbook Pro 8,1 13inch and at first the drive was detected by my Macbook Pro and I was able ot burn a disk but now when I plug in the device, it powers on for a bit then powers off to were I can't eject the disk anymore.Then sometimes it works just fine. I am using an external USB hub with AC plug power so I am confident power to the USb isn't an issue. I just wanted to know are Macbook Pro known to have issues with external drives?
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Ok I solved it.
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You can use one of those cables with on one end two usb plugs and on the other end a mini usb. Connect the coresponding usb for power to an iphone charger or any 5v/1amp charger.
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I have just burned my first succesful disc.
Regards

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Start with the section titled Check the network.
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larry

I doubt this can be relocated or moved so you might want to just repost in the macbook pro area.
MacBook Pro
https://discussions.apple.com/community/notebooks/macbook_pro
https://discussions.apple.com/community/mac_os?view=discussions
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Thunderbolt storage can of course when setup properly reach 100's of MB higher using multiple drives.
Use what you have for a system backup or for secondary backup storage.
you might be able to take the drive - most cases allow you to open and swap drives - and use this:
G-Technology 1TB G-DRIVE mini High-Speed Portable Hard Drive
or this:
http://store.apple.com/us/product/HB137VC/A/g-technology-4tb-g-raid-professional -high-performance-dual-drive-hard-drive?fnode=5f

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By the way, I found your answer by searching this forum. I would suggest using the search function here in the futuere.

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I have a MacBook Pro. My mac can detect wifi. But will not connect anywhere. I did get connected via TCP/IP settings but I can't connect to any wifi anywhere. Network diagnostic has a green light for wi-fi and wi-fi settings. Red light for the rest. (Network settings, ISP, Internet and server.)

Hello NotAppleSavy,
Thanks for the question. After reviewing your post, it sounds like the computer wont connect to networks. I see you have used network diagnostic. I would recommend that you read this article, there are a lot of other things you can do in this article that may be able to help you resolve or isolate the issue.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
Thanks for using Apple Support Communities.
Have a nice day,
Mario

My MacBook Pro no longer "sees" my LACie external hard drive

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FireWire Bus:
Maximum Speed: Up to 800 Mb/sec
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Try using a virtual machine.
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No spaces no characters that are NOT alphanumeric.
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