Imac Mavericks external display not outputting at 1080 only 720

My display works fine on say xbox 360 at 1080p... but imac will only recognise it on 720 ...I have a mini display to VGA cable and even when i hold option on system prefrences > scaled still no luck. Reading forums people are having same trouble. Is is a bug?? workaround?? update fix due?? Anybody please it is driving me crazy this is a big thing for professionals who need multi screen outputs

i found out that i needed a new hdmi lead the vga was no good for my type of tv (LG 37" 1080p). sorry for the delay in reply i havent been online. While im here i wondering if anybody knows where the new location for the "com.apple.QuickTimePlayerX.plist" container plist file is? only on mavericks it seems to have changed location and my spolight seems to not be working.

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Macbook (Late 2007) External Display Not Working

I have an acer x243hq 1920x1080 external monitor which works with my Xbox 360 (vga cable) and my friends macbook (early 2008) but not my macbook
when plugging the external monitor into my macbook using the minidvi to dvi adapter the macbook screen goes light blue and flashes continuously until i remove the cable, the external monitor is just black (does NOT display "no signal") when the cable is removed the cpu seems to have been running at 100%.
i have tried using my friends macbook hard drive in my macbook and the problem is still there therefore the problem must be hardware related?
i have all current updates
Thanks for any replys on how i can fix this

Have you downloaded the Mac OS X (10.5.4) Combo Update? I posted my problem, very similar to yours, and in researching it I found it at: http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx1054comboupdate .html. It might just be what you need!
My problem is that I am running 10.5.7, which I blame for my external display not acting like it did when I was on 10.5.6! One expert at Apple Support told me to erase my HDD, reinstall Tiger, upgrade to Leopard again, but only to 10.5.6! Has anyone any idea as to when 10.5.8 is due out? Is there a Beta?

Two BenQ external displays not working with new 27" iMac

I have a 27" iMac (newest model) and have been using it with a BenQ BL2710 monitor. It's connected with a mini display port to display port cable. It's been working great; I found that I had to uncheck the 'Displays have separate spaces' box in Mission Control, so I have the menu bar on the iMac'd display only.
Now, I have a 2nd BenQ BL2710 that I'm trying to hook up the same way, using the iMac's 2nd thunderbolt port. The display powers up and all 3 screens look perfect. The problem is getting the arrangement correct. I have the dock on one display, the menu bar on another, and the mouse will only work on one or two of the displays, depending on how I change the arrangement.
I want the dock and the menu bar to be on the iMac's display ply, which is in the center. Is there a trick to getting this done, or do I need a third party dock or other piece of hardware to get it to work?

I just answered my own question; apparently with two external displays connected, the dock has to be positioned on the bottom. I had it on the right of the main iMac display. Moving it to the bottom, and rearranging the position of the monitors in display preferences did the trick.
If anyone knows of a way to accomplish this without moving the dock to the bottom of the screen, I'd be interested. I'd prefer it on the right side, if possible.

HT3924 Using iMac as external display for PC. Question re: Cables

I have a PC laptop with an HDMI output, but not a mini displayport. I have a 27" iMac with a mini displayport jack. If I want to use the iMac as an external monitor for the PC laptop, can I use a mini displayport to HDMI cable? Or does my laptop need to have a mini displayport jack as well?
Thanks

This approach will only work if the OP has a 2009 or 2010 27" iMac. It will not work on any other iMacs. What he is attempting to do is called Target Display Mode, TDM is addressed in these two Apple articles:
http://support.apple.com/kb/HT3924
and
http://support.apple.com/kb/TS3775

Incorrect resolution displayed on mavericks external display 1080p

hi. i am running mavericks on imac (intel, amd radeon HD6970 1024mb) and have just added an external display (asus VN279) which i've tried connecting through both mini displayport to displayport and then mini displayport to hdmi. when i select the resolution i have an option for 1080p which is the native resolution of the monitor (and the one that i want to run), however, the resolution that actually comes on the screen is terrible and a totally different and lower one. any ideas on what could be wrong?
thanks
bruno

Hi,
Try to change the HDMI cable. I did display (X1 Carbon 20A7) 4K (3840 x 2160) on TCL (U49S7606DS) using very old but original Panasonic Viera HDMI 1.3a cable. I know it is strange and should not work but it works.
BTW: Here is what Lenovo officially says for the second generation of X1:
Graphics Intel HD Graphics 4400 or 5000 in processor,
external digital monitor support via Mini DisplayPort or HDMI (supports VGA analog monitor via Mini DisplayPort to VGA Monitor Cable); supports three independent displays;
Max external resolution:
3840x2160 (Mini DisplayPort)@30Hz;
2880x1620 (HDMI)@60Hz
Cheers,
a

Using iMac as external display with MBP, can this be done?

I know...
This has been posted before, but I have as of yet not found a straight answer. Mostly peoples recommendation is: "Buy a display".
However, I have an older iMac, 20" and I have a newer MBP 15". The MBP has a faster graphics card, better processor and more RAM. But I still like sitting at the table using my iMac, because the comfort of working is better this way.
Now seeing that I have both, is it possible to connect the two, and use the iMac for a display? Preferably without having to buy a whole lot of expensive cables, applications or do strange hacks risking hurting myself or my computers
Thanks all
Have a nice day

but I have as of yet not found a straight answer.
I think you are getting the straight answer. You need "buy a display" because a display has a video input port. An iMac has a video output port, but NO video input port. Therefore, you cannot use it as an external display, like a regular display.
You could give the iMac a video input using a USB interface device, but the cost of such a device that would provide good quality video into the iMac would cost about the same as (or more than) a low cost LCD display. And it would probably not be ideal in terms of performance.
You could also use this clever program to use a fast network connection and VNC to display the MacBook Pro's second screen on the iMac screen.
http://www.screenrecycler.com/home.html
In your case, the program will create a virtual screen for the MacBook Pro and shares it with the iMac in much the same way as the +screen sharing+ feature. Disadvantages are relatively slow image refresh rate (because the signal is going over the network) and the need to have the iMac turned on and running separately. The speed part will not be that bad in your case, if you use a Cat-5e or better Ethernet cable to connect the two Macs, so that you will have gigabit speed. You can give it a try at no cost to see if it is an acceptable solution (in time-limited demo mode).
I use this program to give my iMac a third display. The +third display+ is an old PC laptop running Linux (Ubuntu).

Using iMac as external display on MBP (Lion)

I'm trying to use my 27" iMac as the external monitor for my MBP, both running Lion. I saw an article (support.apple.com/kb/PH4469; seems to be unavailable now) and said I just need to hit command+F2 once the computers are connected (using thunderbolt to thunderbolt cable). However, Command+F2 doesn't appear to have any effect.
Please advise.
TIA,
David

but I have as of yet not found a straight answer.
I think you are getting the straight answer. You need "buy a display" because a display has a video input port. An iMac has a video output port, but NO video input port. Therefore, you cannot use it as an external display, like a regular display.
You could give the iMac a video input using a USB interface device, but the cost of such a device that would provide good quality video into the iMac would cost about the same as (or more than) a low cost LCD display. And it would probably not be ideal in terms of performance.
You could also use this clever program to use a fast network connection and VNC to display the MacBook Pro's second screen on the iMac screen.
http://www.screenrecycler.com/home.html
In your case, the program will create a virtual screen for the MacBook Pro and shares it with the iMac in much the same way as the +screen sharing+ feature. Disadvantages are relatively slow image refresh rate (because the signal is going over the network) and the need to have the iMac turned on and running separately. The speed part will not be that bad in your case, if you use a Cat-5e or better Ethernet cable to connect the two Macs, so that you will have gigabit speed. You can give it a try at no cost to see if it is an acceptable solution (in time-limited demo mode).
I use this program to give my iMac a third display. The +third display+ is an old PC laptop running Linux (Ubuntu).

Using iMac as external display, keyboard, mouse

I would like to use my iMac as an external display, keyboard, and mouse for my windows laptop. Is there a gizmo that will allow me to do this?
When I am using my work computer (windows laptop) at home, I prefer to have a full size display, keyboard and mouse and would like to see if I can use my iMac for this purpose.
21.5” iMac mid-2011

dwh wrote:
I would like to use my iMac as an external display, keyboard, and mouse for my windows laptop. Is there a gizmo that will allow me to do this?
When I am using my work computer (windows laptop) at home, I prefer to have a full size display, keyboard and mouse and would like to see if I can use my iMac for this purpose.
21.5” iMac mid-2011
No, not unless your Windows box has a Thunderbolt output port which it almost certainly does not. Please carefully read Apple's Target Display Mode 2011 Macs that extplains.

External Displays not working

My 1.67 PB suddenly stopped recognizing any external display devices I have plugged in. I have tried both the S-Video and the DVI and have repeatedly clicked "Detect Displays"... nothing. With the DVI connection, the PB screen flashes blue for a second but then goes back to normal. I have tried to restart with and without an external device plugged in. I have also tried to put the PB to sleep, plug in the external device, and wake it up... nothing.
The only thing I've done to my PB between yesterday (the last time my S-video output worked) and today was to install the Final Cut Pro 5.0.3 and Cinema Tools 3.0.3 updates via Software Update.
Does anyone have any suggestions?
Thanks,
John

It's working. I have no idea why, but I'm not complaining.
Thanks,
John

Connecting iMac Keyboard to Macbook Pro while using iMac as external display

I'm trying to using my iMac wireless keyboad for my macbook pro while my iMac is in external display mode but I can't get the keyboad to connect. I've tried disconnecting the wireless keyboard from my iMac but it won't go into target display mode without the keyboad. Can I used my iMac wireless keyboard with my Macbook pro while my iMac is being used as an external display?

No, not reliably. If it's paired with both machines you can turn it off and turn it back on but it's a toss up which machine it will connect with. If you took it to another room so the iMac didn't see it, you'd have to disconnect the minidisplay port/thunderbolt cable and then it would exit target mode display.

Mini Displayport - VGA - External display not detected on 9400m

Hey guys,
I really need help, I have 2 HDTVs and for both of them gives me the plain black screen with gray noise. The update did not help, and the only way to run external display is through 9600m GT, and obv that is not good for your computer. Is there anyway or solution to fix this problem, and since Apple is pretty useless lately, other then say "re-try the update".
In more detail: It seems to detect that I have plugged in the adapter since I see the changing screen process, but once the screen is changed it outputs the display for less then a second and then gives me the black screen. If I check my macbook pro, it doesn't detect that there is an external display plugged into the laptop.
HELP! PLZ! I'm sick of this problem! TRIED the PRAM RESET 2! Almost everything

I think the only way to do this is to spoof a monitor connection using a hardware dongle that transmits EDID. This thing should work.
http://www.macfriends.com/index.asp?PageAction=VIEWPROD&ProdID=2446
Hope you have time to order and receive it in time for your presentation. Good luck.

IMac 24¨External display no longer working

I have a Intel iMac 24¨using an additional external display - Fujitsu.
It has worked perfectly since I bought it and suddenly the external display will no longer work. There is nothing wrong with the Fujitsu because I have tested it on other computers but will no longer work with the iMac.
I have checked all connections, running current update and I am now at a loss as to what to do next.
I read that there were problems linking external displays when the iMac 24¨came out but I am assuming that this was resolved long ago. Even so, mine has worked fine until now. Any ideas please?!
Thank you

Hi Canaryguy
1. Shut everything off display, computer and disconnect everything.
2. Reset the iMac's SMC > http://support.apple.com/kb/HT3964
+● Shut down the computer.+
+● Unplug the computer's power cord.+
+● Press and hold the power button for 5 seconds.+
+● Release the power button.+
+● Attach the computers power cable.+
+● Press the power button to turn on the computer.+
3. Now first reconnect the DVI or VGA cable to the Display.
4. Then connect the Mini DVI to ??? to the Cable coming from the Display.
5. Lastly plug the Mini-DVI adapter into the iMac.
6. Then turn the Display on and startup the iMac.
If that does not work try a different Mini-DVI to ??? adapter and cable, or test your adapter, cable and display with another iMac.
If all of the above fail, then the iMac needs to be serviced.
Dennis

Using imac as external display for my MacBook

Can I use the new iMac as an external display for my MacBook?

Here's the >New iMac Spec's and there is only Mini-DVI output port and "NO" input port.

Using iMac as external display from Macbook Pro flickers static and crackles.

I'm trying to use my iMac as an external display.
When I plug in my early 2011 Macbook Pro into my Mid 2010 iMac via a Belkin Mini DisplayPort to Mini DisplayPort, the iMac screen flickers with static and there's random crackling noises.
Weird thing is, when I try the same thing with a new Macbook Air, everything works perfectly!
Here's a quick video demonstrating what I'm talking about - http://youtu.be/xxTXVRffWwE
Are the two not compatible or do I just have a defective Macbook Pro? The Macbook Pro works fine with the Cinema Display I have in the office...

Huh, It should work like this:
Target Display Mode: Frequently Asked Questions (FAQ) - Apple Support
iMac Model
Cable Supported
Port on Source Computer
iMac (27-inch Late 2009)
Mini DisplayPort to Mini DisplayPort
Mini DisplayPort or Thunderbolt
Actually that table seems illogical. The cable supported is mini to mini display but the port says "or Thunderbolt"
Does that seem contradictory to you?

Hooking iMac to external display when LCD is broken

Per the Genious bar people at the Apple store, the LCD display on my iMac is broken. She told me I could hook it up to an external display and use it or I could get it fixed. I decided to hook it up to an external display, but from searching other forumns, it looks like it is only extending what is on my desktop and not mirroring it because all I see is the background of my desktop, no icons. Apparently, I need to go into System preferences and change something. How can I do this if nothing is showing on the iMac LCD display? Is there a shortcut key on the keybord or something?

CMD F1 was the keyboard shortcut....

Imac Mavericks external display not outputting at 1080 only 720

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