IMac :: No Option To Detect External Display / Screen Resolution
Aug 6, 2010
I have a 27" imac and have been using an apple led cinema display with it. I have had no problems with the display until today. Yesterday I installed windows 7 via bootcamp and had some trouble with the second display being detected but after downloading all of the bootcamp updates it worked fine. Today I restart my computer back into OSX and the display does not work. I tried resetting the PRam or whatever but that didnt do anything. When I go to system preferences > display there is no longer an option to detect display and there are no longer options to change the screen resolution.
I spoke with an apple tech who has me installing an update but I dont think she really knew what was going on and I doubt this will work. When I reboot back into the windows partition the display works during start up and I see the windows logo. So I dont think its a hardware issue (also the display still works fine with my macbook pro). But as soon as startup finishes I get a black screen. Under the control panel windows still recognizes that there is a 2nd display attached and you can still drag items over to the other screen, I just cant see anything. All black.
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Jan 11, 2011
I have an Acer 22" display (the x223w) that I have been using with my old powermac g4 for a few years and its been great. I recently got an Aluminum macbook and wanted to use the display with it at my desk. I got a cheap mini display-port to DVI adaptor from amazon and when I plug it in, the display looks a bit fuzzy! It is set to the same resolution as when it was hooked up to the powermac, but everything looks a bit bigger (doesn't this mean the resolution is lower?) and the text especially looks a little fuzzy. Is it the cheap adaptor? I have it set to 1680X1050 on both computers. I feel like I just want to adjust the sharpness, but the display doesn't have that option. Also, it seems weird since it looks fine with the powermac.
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May 14, 2012
I have a 2.93 GHz Intel Core 2 Duo (24" early 2009) iMac running OS 10.7.3 (Lion) to which I have connected an Apple Cinema Display as an external monitor using a Mini Display-to-DVI adapter. The iMac is set to 1920 x 1200 resolution and the Cinema Display is at 1680 x 1050, and everything looks great until I turn on mirroring. When I do this, the iMac screen loses its nice crisp screen resolution, but the Cinema Display still looks fine. Strangely, the pull down menu for displays in the menu bar still claims that the iMac is at 1920 x 1200 and the Cinema Display is at 1680 x 1050, but I don't think this is the case. Is there any way to keep the iMac at the higher resolution while mirroring?
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Jun 25, 2014
I'm trying to write an AppleScript to change the resolution of my external display from 1920x1080 to 800x600 and back to 1920x1080 (it has a few issues and this fixes them, but I'm tired of going into System Preferences to do this all the time). I can get the script to open up System Preferences and option-click the scaled button (so all of the different resolutions come up), but I can't get it to select anything inside of the box where all of the different resolutions are (I can't find what I'm supposed to refer to it as anywhere and if I find something it doesn't work). Here's the code I have right now:
tell application "System Preferences"
reveal anchor "displaysDisplayTab" of pane "com.apple.preference.displays"
end tellÂ
tell application "System Events" to tell process "System Preferences" to tell window "LCDTV16"
[code]...
I have a 15" Mid 2012 MacBook Pro (non-Retna) running OS 10.9.3.Â
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Jul 17, 2009
I have 2 monitors connected to my mac mini. one with the mini displayport to vga, and the other mini dvi to vga. both of the monitors are exactly the same and they used to be set to the same resolution 1440 x 900. however one came unplugged and now it doesn't even give me the option to choose this resolution anymore. Is there anyway to fix this?
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Mar 4, 2007
I just purchased a Mac Mini and am using a DVI to HDMI cable to connect it to my 42" Sony KDF-E42A10. I am unable to achieve full-screen resolution and downloaded SwitchResX to manually adjust the display. Does anyone know the timing parameters for the Sony or how to achieve full-screen resoltuion?
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Jul 24, 2009
So I've had a 15" Unibody MBP since around November and I haven't been able to get it to work with my Hanns G 19" widescreen monitor. It should work at a 1440x900 resolution but its not even listed as an option when I hook it up. The monitor has both VGA and DVI inputs but I'm using the mini to VGA adapter (I picked up VGA to connect to a projector at school). I don't know if using the DVI adapter would do the trick or not and I'm not willing to waste $30 to find out as I'm a pretty poor college student at the moment.
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Apr 24, 2012
I have a 2011 MBP (thunderbolt) that I've had for about a year now. I use it daily at work, with an external LCD monitor connected with a mini-dvi -> DVI, no problem, except for the occasional need to restart when first connected.
However, at home I have an AOC Razor 24" monitor that until recently was connected to my home PC via HDMI, working just fine. However, my PC died and now I would very much like to be able to use this monitor at home until such a time when I get around to finding a desktop replacement. My MacBook Pro, however, has completely different ideas it seems... It completely refuses to recognise the monitor. I don't get the blue "flash" and it doesn't show up int eh display panel at all, not "sleeping" or otherwise, it simply looks as if it's not there.
Having trawled the forums, I've done the Jan/Feb firmware update, I've tried two different HDMI converters (One the Moshi from my local Apple retailer, the other a no-name brand converter, which works fine elsewhere), I've even tried a mini-dvi -> DVI -> HDMI converter (I know, I didn't expect it to work, but when you're at then end of your wits, you're at the end of your wits ). I've gone through three HDMI cables and tried an assortment of "black magic" solutions found on the net, with the adapter half-way plugged in, resetting the PROM, closing/opening the lid, running gfxCardStatus ( just in case it did something ) and checking the monitor elsewhere.
The only thing I haven't done (that I can think of) is swap the actual MBP,however, as mentioned, I use an external DVI monitor every day, so it doesn't seem likely that that's where the problem is... I'm guessing it's got to do with how the monitor handles HDMI or some such thing but I don't seem to be able to find much of a comment from anyone else on the net, so here I am... I considered sacrificing a goat at full moon, but I'm not entirely convinced that'll do much either and I upgraded to Lion as I saw a throwaway comment somewhere from someone, indicating that that might or might not have helped them with a slightly similar problem... So this problem now spans 10.6 AND 10.7...Â
Info:
MacBook Pro, Mac OS X (10.7.3)
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Jun 3, 2014
I'm using a temporary monitor while my trusty old Mac HD Cinema Display is in the shop getting fixed.Â
As a stopgap I am using a Samsung T190. Â
My computer is a Mac Pro tower. I'm running 10.7.5 (Lion) as I'm still working with Final Cut Pro 7.Â
I can't get an option to switch the screen resolution to 1920 x 1200Â
I can go no higher than 1440 x 900.Â
In my quest for a solution I read something about the option key and the "scaled radio button" in the display preferences.Â
I don't see a "scaled radio button" in the preferences.Â
Here's what the Display Preferences look like:
Info:
Final Cut Pro 7, Mac OS X (10.7.5), Mac Pro
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Feb 4, 2012
I'm using a mini display-port to hdmi lead and it worked once. I unplugged the hdmi cable when it was still connected to the mac and now it wont find it.
Info:
iMac (27-inch Mid 2011), Mac OS X (10.7.3)
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Dec 20, 2008
New MacBook rocks and in cables to hook it up to my Sanyo HDTV 1080p. I plug in the HDMI cable and the picture comes on.
However, every once in awhile the screen goes black and it says "Signal Not Found." Also, every time I turn on the MacBook I have to unplug the HDMI cable, wait a few seconds, and then plug it back in before it will detect the external display.
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Dec 24, 2009
The title says it all really... Quite a simple problem that I can't find any answer to!
I've hooked up my 30" Apple Cinema Display to the new iMac 27" and the highest resolution I'm getting as an option is 1280x800... The iMac correctly detects the ACD as a Cinema HD display but limits my resolution. Why oh why?!
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Sep 8, 2014
I bought a MBA 13" last month and now I'm trying to connect an external monitor through a Mini Display Port-to-HDMI adapter and most of the times the display shows a message "No signal detected"...
I've tried all the possible combinations between the MAC and the Monitor but it would seem a random matter.
Info:
MacBook Air (13-inch Mid 2012), Mavericks 10.9.4
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Aug 6, 2010
I posted yesterday about my 1.83 17 inch first generation intel iMacs screen dying. If we get an external display, is there a way to make that the main screen?
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May 18, 2009
I have a 24" external display and since 10.5.7 I cannot use it with the native resolution (1920x1200), the maximum I can pick is 1920x1080.
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Jul 28, 2010
I have an 28 inch Dell LCD screen that has a native resolution of 1920x1200. Does the MBA support that resolution through the Mini DisplayPort? The specs on the Apple website list the following:
"Supported resolutions: 1280 by 800 (native), 1152 by 720, 1024 by 640, and 800 by 500 pixels at 16:10 aspect ratio; 1024 by 768, 800 by 600, and 640 by 480 pixels at 4:3 aspect ratio; 720 by 480 pixels at 3:2 aspect ratio". But I read that the MBA can also do higher res.
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Dec 1, 2014
I'm in the market for a new external display. I believe I have 3 options with the Thunderbolt(not mini-display)port on my Mac.Using my mini-displayport to VGA adapterUsing my mini-displayport to HDMI adapterUsing just a thunderbolt cable.I believe that there are Thunderbolt displays on the market (AOC has a 21:9 one I believe).
What is the maximum resolution for an external display for my MacBook Pro? Does my mac support 4K? Does it support 21:9? Specifications of my MacBook:
-MacBookPro9,2
-OSX 10.9 Yosemite
-13" mid 2012 not retina
-250GB SSD
-16GB RAM
-Intel HD Graphics 4000 1024 MB
Info:
MacBook Pro, OS X Mavericks (10.9)
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Mar 17, 2009
I have a MacBook Pro. I see that the new iMacs have a mini displayport input so that the 27" screen can be used with my MacBook Pro. I'm wondering how this works? Since there is obviously no button to push, how exactly do you switch between the iMac and the MacBook Pro displaying on-screen?
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Nov 14, 2010
Is it possible to somehow capture a screen from iMac 27-inch and while it is used as external display (display for Xbox 360 - I have Kanex XD HDMI converter)?
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Oct 2, 2008
We have an iMac G5 running 10.4.11 which developed some nasty colour banding down the screen and have now plugged in an external display. How can you turn off the iMac display so it only outputs through the external monitor?
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Apr 26, 2010
I have a Macbook Pro I bought new in June 2008 (Not Uni-body). It's a 15 inch with the standard options. I want to make a desktop setup on a budget and I'm wondering if my MBP will fill up this display at the complete resolution (1920 x 1080) and if it will function completely with the peripherals on the monitor. [URL]. Here is the display I'm looking at. Seems like a good deal, but I haven't done a lot of shopping around. I don't do graphic design and as I said, I'm on a budget, so the Apple displays are out of the question.
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Mar 1, 2009
I have an "old" BlackBook, how do I set it up to an external display. Also, what display do you recommend, which one is the best?
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May 7, 2012
I have the latest model of macbook pro 15" (entry-level one) and since a few minutes ago the screen has gone mad. It seems it has gone to lower resolution and the desktop doesn't fit on the screen anymore. I have to drag the mouse to the edges of the screen to see the parts that are hidden. I tried SMC reset, PRAM reset and it didn't fixed it.
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Feb 3, 2010
I have my MacBook hooked up to an external monitor of 1920 x 1080 resolution. I don't use the MacBook screen at all. Every time I turn on my MacBook it displays on the external monitor as it should, but at the MacBook's 1280 x 800 resolution, which obviously looks nasty and stretched on the big monitor. I fix this by simply putting the Mac to sleep and pressing a key on my keyboard to wake it up again; and it loads in the proper resolution. Is there a way to make it display 1920 x 1080 on boot up without having to sleep and wake every single time? Keeping my MacBook in sleep mode when not in use isn't an option.
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May 19, 2008
I am connecting my Macbook on my HD TV but the osx does not detect the appropriate native resolution. MY Samsung TV has a native resolution of 1365x768 but the osx only detects and offers 1280 or 1920 (they both look really bad on my TV). I used a mini-DVI to DVI adapter and a DVI to HDMI cable. I also tried, without success, to create specific display settings using SwitchResX and DisplayConfigX. (10.5.2) I know that there is not a big difference between 1280 and 1365 but still, it's very annoying espacially that I my old PC with XP detected the right resolution as soon as connected it...
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Apr 20, 2010
I've just bought a MBP 15" and am wondering if I can connect a 24 inch monitor too make it a extended display. Can someone make a recommendation on what monitor (24 inch) display to buy? And Which connector to get so I get full resolution on the external display?
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Jan 24, 2009
So I tried to set up bootcamp on my 10.5.6 17" iMac. the windows installation failed because of a bad disc so I restored my computer using my OS X disc and time machine. Now my display in OS X is being forced to 1024x768 and I cannot change it to anything else. It looks terrible and there are some artifacts... Any idea what the heck happened?
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Mar 29, 2010
Question: How can I set the resolution of each display individually? Details below:I have the new iMac 21" and an LG W2252 display from my old PC. I'm a newly converted mac user. I connected it to the imac and it worked. But the resolution is horrible. I can change the resolution when the displays are mirrored. But then when I uncheck mirror the resolution for each display cannot be changed individually. The LG goes out of range and won't show anything until I bring the resolution down and mirror the imac. Is this problem with the LG or the mac?
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Jun 7, 2010
I got a Matte screen 2010 MBP. It comes with higher res screen. I personally find the text to be a little bit too small for my liking. Is it possible to uniformly make everything bigger so the higher res only make image and text sharper and not smaller than original resolution?
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Apr 19, 2012
Since downloading the new OS Lion10, my screen display continues to change resolution (+4x) without any prompt, changing to a new app is the only way to go to the original resolution… Is there a setting that needs to be changed to stop this from happening
Info:
Mac Pro, Mac OS X (10.7.3)
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