How do I display external monitor as sole display, rather than mirroring, with lid open?

sudo nvram boot-args="iog=0x0" restart to take effect

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How can I make an external monitor the main display?

I have a mid 2007 iMac running OS X 10.4. The internal monitor is broken and all it shows is a bunch of lines.
I have connected an external Samsung monitor. All I see in it is a desktop background: no icons, no menus, no dock. I believe this is because the display is in extended mode and the main display is the internal monitor. I cannot use the System Preferences Panel to change this, because the internal monitor is useless.
I have a second, newer iMac, from which I can login to the first via ssh.
Is there a way to make the external monitor the main display from the command line?
(I have though of editing the Preferences List, but I do not know what to change and how to change it. I do have Developers Tool installed and thus can access the Preferences List Editor.)
Thanks in advance!!!
Gustavo J. Mata

Hi everybody!
To solve the problem I wrote a script that creates a Systems Preferences windows which shows up in the external monitor. Once this happens the configuration can be changed manually, to make the external monitor the main display. This is what I did:
First I created a user with automatic login in the faulty machine. To do this:
1.- Restarted this malfunctioning iMac in Firewire Target mode.
2.- Rebooted the working iMac using the other machine as startup disk.
3.- Created the user.
4.- Restarted both machines normally
Next I wrote a script which opens System Preferences and shifts its window to the left:
5.- In the working machine I saved the script as a 'Run only' application:
tell application "System Preferences"
activate
set x0 to 1080
set y0 to 200
set dx to 800
set wx to 600
set wy to 600
set the bounds of the first window to {x0, y0, x0 + dx + wx, y0 + wy}
end tell
6.- Then uploaded it to the iMac with the faulty screen.
7- Shut down both machines.
Then I added the script application to the automatic login user in the faulty machine:
8.- Restarted the malfunctioning iMac in Firewire Target mode.
9.- Rebooted the working iMac using the other machine as startup disk.
10.- In System Preferences added the script to login items.
11.- Restarted both machines.
The System Preferences window now showed in the external terminal. I was able to go into the Displays pane and set the external monitor as the main display (dragging the white bar to it).
Cheers,
Gustavo J. Mata

I connected an external monitor to my MacBook Pro, but it doesn't open any programs. It Just sits there with a blank screen. How do I get it to open programs and act like a monitor?

I connected an external monitor to my MacBook Pro, but it doesn't open any programs. It Just sits there with a blank screen. How do I get it to open programs and act like a monitor?

Dear Jean:
It sounds like you are trying to get your external monitor to act as the primary viewing screen. For example it would have your Doc, Icons, Etc. In order to make the external monitor the primary screen you have to:
Open System Preferences.
Choose the Displays Icon
There will be several tabs to choose from pick Arrangement
Drag the toolbar to desired display
Let me know if this helps at all!
Lance

How do I use my late 2011 iMac ( with thunderbolt) as external monitor for laptop/Xbox or other device with hdmi as output.

May be this question has been asked thousand times. how do I use my mid 2011 iMac ( with thunderbolt) as external monitor for laptop/Xbox or other device with hdmi as output. if apple hasn't removed that feature and has just moved that functinoality to thunderbolt then how can I use it. currently there is no laptop available with thunderbolt output. no 3rd party converter available. whats the use of having feature on latest functionality if we cant use it. I wish they would have made one port has mini-dvi and other thunderbolt for backward compatibility untill some vendor comes up with converter.

It Says :
Mac (21.5-inch, Mid 2011) and iMac (27-inch, Mid 2011) and later computers support Target Display Mode via Thunderbolt to Thunderbolt cable (2 m) when the source is another Thunderbolt-equipped computer.
Name one computer model/vendor which has thunderbolt as output for display + audio. this is so stupid to move to new technology without availbility of its compatible devices.

How to connect an external monitor to macbook pro. The monitor has no usb connector without a usb

How to connect an external monitor to macbook pro. The monitor has no usb connecter, only a port.

Most MacBook Pro models have a Mini DVI port, a Mini DisplayPort or a ThunderBolt port for connecting an external display. USB does not have enough bandwidth to support a responsive display connection.
What model MacBook Pro do you have, by year, CPU speed or MacBook Pro 3.1 designation?

External Monitor will not display full view MS apps.

I have a HDMI monitor that was previously working fine. The other day I went to use Word and Excel and the applications would only appear in the lower toolbar. When I would select them they would not enlarge. They remained in a thumbnail view. My email and Internet work as expected. Any ideas what's causing this?

Hello @Bjenkins,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your external monitor will not display full view Microsoft applications on your system, and that certain functions will not work on your desktop. How long ago did your applications work properly? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

How to connect two external monitors to a Mac Book Pro?

How to connect two external monitors to a Mac Book Pro?

Not as is, but Matrox makes a peripheral that enables connecting more than one external monitor - matrox.com.

How to run an external monitor with lid closed

how to use an external monitor with the "lid" closed

You can use your MacBook in Clamshell Mode with a wired or Bluetooth keyboard and mouse. http://support.apple.com/kb/HT3131

I use Mail. How do I attach a file as an icon rather than showing the full text in the message?

I use Mail for my email messages. How do I attach a file as an icon rather than showing the full text in the message box?

Glad you got it working! Incidentally, if you have a relatively new Apple mouse (Magic Mouse or Mighty Mouse should work), you should be able to enable right-click, if you'd like it, by going to System Preferences - Mouse - and turning on "Secondary click". Third-party mice, like Logitech or Microsoft, should have right-click automatically.
Matt

Health app, is it possible to display weight and distance in imperial rather than metric ?

health app, is it possible to display weight and distance in imperial rather than metric ?

Hao,
first of all, you are using a chart which has three options for updates if the chart is "full":
Strip chart (default)
Scope chart
Sweep chart
These are called "update mode". Test the modes yourself.
Also you have to know that you will not likely have an integer number of periods of your signal in the display of the chart. Therefore, a continuous signal will "move" the graph from update to update.
You can implement some algorithm to discard data to maintain a static "trigger" level for display, but as stated, it will leave gaps in the signal. These gaps are not a concern unless you use the displayed signal for analysis (e.g. FFT).
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

How to setup dual external monitors on a MacBook Pro 15" A1398?

Need to setup dual monitors for my new MacBook Pro 15" Retina Display A1398. I am in instructional designer and need the larger display from dual monitors. I think the best way is to connect using a Thunderbolt to HDMI adapter in the two Thunderbolt ports or HDMI out of the one HDMI port and the other using a Thunderbolt to HDMI adapter. I have two Thunderbolt ports, two USB ports and one HDMI port. How do I setup OS X Mavericks for this as well. I want to run it in clamshell mode. Wondered if there are any better or easier ideas?
With peace and love,
Sam K.

Hi! I recommend you using both thunderbolt ports with their HDMI adapters, i don't know why but in my case it has worked better than having one monitor connected on one thunderbolt port and another on the HDMI port. As for the clamshell mode I recommend you this articles: Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display and http://osxdaily.com/2012/06/08/quickly-enter-clamshell-mode-with-an-external-dis play-in-mac-os-x/.
This are a few recommendations:
1. Use a usb mouse and keyboard, because sometimes bluetooth ones are not that trusty
2. You could buy one of the fancy things (you can see one on the second article) that hold your macbook up to prevent overheating. If you can't afford one or you don't to buy one, you can prop your macbook with some books on the side of the union between the lid and the keyboard (i don't know the word in english) and a very heavy one on the other side.

Lion and Multi-Display (2 external monitors + built-in Display) [Thunderbolt, USB adapters/eVGA UV+]

Hi everyone,
I just completed an upgrade to Lion and while I love it I've suddenly found myself short 1 display. I use 2x24" with my MacBook Pro - 1 via mini Display Port [the Thunderbolt port] and another via an eVGA UV+ [both displays have a resolution of 1920x1080].
There are two things that I am wondering about:
Has anyone else who's upgraded found their UV+ adapter to be useless all of the sudden? I'm contacting eVGA to find out how soon we can expect a functional OSX 10.7 Lion driver for that but in the meantime...
Has anyone heard anything of a Thunderbolt splitter "adapter" - it is obvious that you can have 2 displays chained to a MacBook Pro, as long as both of these displays are of the Thunderbolt Cinema Display variety ... seeing as I don't have two grand and already own 2 smaller monitors that I'd been using with Snow Leopard for quite some time now I was curious if there's just a way to ditch the USB adapter and just have the Thunderbolt port on my 2011 MBP drive both displays (I am fully aware that the GPU is capable of it but have yet to find a hardware display port or thunderbolt cable that splits in 2 so I can just hook each display into it and call it a day).
Thank in advance to anyone and everyone who provides any information related to that stuff as I'd greatly appreciate your help ... once you're used to the extra screen real estate going down from 3 screens to 2 can be pretty painful.
On that same note a general observation about Lion is that while I love full-screen apps I'll barely ever use them whenever I have external displays hooked up as Lion seems to insist on making the full screen app go to the primary display while completely blocking off the secondary display (rendering it useless). Hoping that Apple will make the UX for mulit-display folks nicer someday, I know their focus was just to release Lion now but there's absolutely room for improvement as far as that goes.
Thanks in advance to anyone and everyone who responds to this post!

nickdotvr wrote:
Turns out that's not truly the case - see http://www.macrumors.com/2011/09/16/apple-thunderbolt-display-with-multiple-moni tors/ for details but the short of it is that if you just get one and plug in a Display Port Monitor you won't get that extra screen real estate after all.
Yes... the actual marketing 'statement' says you are unable to connect the mDP display "directly" to the back of the new TB display. Yes...
But... from what i hear... if you have some other TB display "directly" connected to the downstream of the TB display, you can 'then' add your older mDP display to the chain at that point. You just can't have the older mDP directly to the new TB display.
And this still stands true if you read previous info from Apple website. It's all about the wording...
So basically, you should still be able to have your MBPro + New TB display + (some other TB device w/ 2 ports) + old mDP display.

How to configure 2 external monitors with X1 Carbon

I have a brand new X1 Carbon (Generation 1 3444-CYU), and I also have the docking station. My intention is to be able to have the laptop cover closed, and to use the power switch on the top of the docking station to start (apply power to) the laptop, and to have the output be driven to two DVI monitors.
At this point, I'm able to have the laptp drive the main screen (part of the laptop) and the two external monitors, but I cannot seem to figure out how to use the docking station to "start/boot" the PC, and to have the bootup sequence, and other subsequent display presented on the two DVI screens only.
As I've been looking through the knowledge base, I'm surprised that there are not simply a series of articles that describe the various options for configuring monitors, so I'm forced to post this request. Can someone help?
thanks

I see this is an old post, but I figured I'd respond in case someone else is having the same problem.
There is a setting in the BIOS where you can have the X1 power on automatically when you plug it into the dock. I believe the setting is called something to the affect of "Power On When Connected to A/C." This solves the problem you and describing and I have been using with successfully with a dual monitor set up.

Macbook screen/display comes on and then goes dark; external monitor shows the screen in the mirroring mode; What's wrong, please. Thanks.

My Macbook (Black,August 2008...love it!) screen lights up/comes on and then immediately goes dark; the screen shows on an external monitor in mirroring mode. Any thoughts/suggestions. Many thanks.
Model Name:          MacBook
Model Identifier:          MacBook4,1
Processor Name:          Intel Core 2 Duo
Processor Speed:          2.4 GHz
Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          3 MB
Memory:          4 GB
Bus Speed:          800 MHz
Boot ROM Version:          MB41.00C1.B00
SMC Version (system):          1.31f1
Sudden Motion Sensor:
State:          Enabled
Chipset Model:          GMA X3100
Type:          GPU
Bus:          Built-In
VRAM (Total):          144 MB
Vendor:          Intel (0x8086)
Device ID:          0x2a02
Revision ID:          0x0003
Displays:
Color LCD:
Resolution:          1280 x 800
Pixel Depth:          32-Bit Color (ARGB8888)
Mirror:          On
Mirror Status:          Hardware Mirror
Online:          Yes
Built-In:          Yes
Philips 191EL:
Resolution:          1366 x 768 @ 60 Hz
Pixel Depth:          32-Bit Color (ARGB8888)
Display Serial Number:          AU11103006796
Main Display:          Yes
Mirror:          On
Mirror Status:          Master Mirror
Online:          Yes
Rotation:          Supported

Hi, firetiger.... i have the EXACT same problem!!! i have the same Macbook aluminum unibody screen also. I have no idea how to fix it. I'm also out of warranty and i've tried everything... resetting the pram, trying to restart in safe mode, trying to boot from a cd... .NOTHING WORKS!!! i can still control brightness itself but ive never tried attaching to an external monitor. I know everything is loaded correctly... i just don't know whats wrong. If you have any ideas.. please let me know. Also, I think apple will fix the macbook pros with a similar issue for free http://support.apple.com/kb/TS2377 but i know this doesnt apply for me. hopefully they work something out because I really love that computer!!!

How to callibrate my external monitor to my macbook?

Now that my external monitor is connected to my MacBook, what do I do now and what setting do I use? How do I callibrate them for the best scree view without distortion?

Most MacBook Pro models have a Mini DVI port, a Mini DisplayPort or a ThunderBolt port for connecting an external display. USB does not have enough bandwidth to support a responsive display connection.
What model MacBook Pro do you have, by year, CPU speed or MacBook Pro 3.1 designation?

How do I display external monitor as sole display, rather than mirroring, with lid open?

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