OS X V10.7 Lion :: Correcting External Monitor Screen Resolution?
May 9, 2012
I have a 27" iMac and have connected a Philips 160e as a pallette monitor via a Mini Display Port to VGA adaptor. the iMac sees it but auto picks the wrong resolution 1280 x 1024 (stretched) instead of the Philips' 1366 x 768 @ 60Hz.
If I try to change the resolution the screen goes black which is symptomatic of using the wrong refresh rate, and of course I can make no further adjustments. esc does not get me out of the black screen.Â
What is worse the iMac seems to remember the wrong resolution/refresh rate after restarts.Â
I have tried Safe Mode (it stayed black) and booting off an external hard drive into another system (back into black if I change the display settings).
I have gone into System Preferences > Display > Color >unchecked 'Show profiles for this display only' > selected > Philips 160E in the list
It only contains .icc profile information, which I suppose is to be expected but is the only access I can find to any specific model data. The same display works fine with an older 24" iMac, using a different adaptor because of the different display port.
Somewhere OSX is storing the settings for the external monitor, I'd love to be able to trash it or change it back.
Info:
iMac, Mac OS X (10.7.3), The closest you'll ever get to there, is here.
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Mar 25, 2012
I have been having some problems with my Macbook Pro. I have a new BenQ screen connected to it via the Mini Display Port to VGA adapter from Apple. No matter what I do, I cant seem to be able to change the resolution to anything higher than 1280x1024, which is a pretty stupid resolution to have on a 27'' monitor. Sometimes when I plug it in, it gives me the option to change the resolution to 1920x1080.
But when I select it, the screen goes black and displays the message "No signal detected". Now, as it happens, I have a copy of windows installed on a partition of my hdd, and the screen works flawlessly on it. full HD with 75 Hertz. So that shows that it is not a hardware problem, it has to be a software problem. I tried everything, including reinstalling OS X, and deleting the "windowserver" files. no success.
Info:
MacBook Pro, Mac OS X (10.6.8)
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Dec 5, 2007
Thing is I got hold of a 1ghz 17" iMac almost for free, it had a dead logicboard (I checked it with a voltage-meter), but I figured I could fix it and have a small hobby project-thingie going on. Well I just got a new logic board today, for a 1ghz 17" iMac g4.
Things is I only get a bright grey screen from my Mac when I boot. I've tried connecting it to a external display and that works fine. Everything is there.
I then reinstalled Tiger on it, with the computer connected to my external screen. And I still have the same problem. (I have now disconnected the ext. screen and is controlling the iMac from my MBP). So at least it isn't the installation.
So what is the problem? I can via an Apple Keyboard control the brightness on the blank screen, which would indicate that it does react to input of some degree.
I've read that if the inverter is dead or anything else is dead, you would get a rolling grey screen, flicker or something like that and not a steady bright grey. One thing I'm thinking is. What if somehow this logic board was for a 15" 1ghz imac g4? Can I check this?
I read that long thread about guys buying hi-res displays for their MBPs, and they had to replace some display profile? Could I maybe fix it with a different display profile-file?
I'm really confused by all this, and would appreciate any help I can get.
Model: PowerMac6,1
CPU-Type: PowerPC G4 (3.3)
and
the gfx chip is a GeforceMX4 with 32mb.
The display is a mode 9c27, manufacturer 610, serialnumber 00000, manufacture date: B84D7200.
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Feb 5, 2009
Just bought a new 22' LG monitor and I have the Mini DisplayPort to VGA. When I connect my monitor to my MacBook all is OK until I try to chose the 1680x1050 which is the LG's prefered resolution. When I chose it, my monitor turns to black, then after a while it shows the picture for a second, then black again.. Is this a 9400m fault, or the VGA adapter fault?If I try a MiniDisplay port to DVI, will it work in 1680 x 1050?
All the other resolutions are shown ok..
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Aug 13, 2010
Recently I plugged my HD Monitor to my MacBook and the resolution changed (on the external monitor). I went to Display Preferences but I do not get any resolutions above 1600x1200. When I first used this monitor, I could use it at 1920x1080 and now I simply can't. I don't know if it's a PRAM issue. I reset it but nothing changed.
I'm using a HP 2309m monitor in VGA mode using the VGA-Mini display port adapter. I use the monitor with a PC in DVI mode, but I never use these connection at the same time. I noticed something. When I first used this monitor, Mac identified it as HP 2309 when I opened the display preferences. Now, it only recognizes it as Display.
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Oct 27, 2010
I just found out that if I use the "mirroring" mode, and I set the resolution to 1680x1050 and 60hz(my monitor max resolution/hz), it's all kinda blurry... But if I put in sleep mode ma MPB and wake it up "switching on" my bluetooth keyboard, the monitor in my MBP doesn't even start and it just use the external monitor. In this case, there's no more blurriness but the settings are the same! Then, I can even turn on my MBP monitor (pressing some random key on its keyboard) and nothing change, still no blurriness...
How can this happen? By the way, there is another funny issue: if I use this "trick", the applications that should run in "fullscreen" (not really fullscreen, just the window that use all the screen size), like iTunes, don't do it anymore....
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May 19, 2010
I have a Macbook Pro 13 inch 2010 model hooked up to a NEC Multisync EA231 WMI external monitor. The monitor is supposed to have a resolution of 1920 X 1080, but my computer only recognizes 1600 x 900 as the highest resolution. I've tried both mirrored and extended desktop, and I've also hooked up the monitor through a DVI adaptor and through a displayport cable. An Apple support person suggested using a dual-link DVI adaptor, but according to the Apple site this shouldn't be necessary for 1920 x 1080 resolution (I've also heard that it's a buggy piece of hardware). Any suggestions for getting optimal resolution?
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Jul 5, 2010
I'm using a MacBook Pro OSX 10.6.4, have a simple dongle I purchased at the Mac Store which takes only DVI. The HP 2304 widescreen monitor only works with windows mirrored and has poor resolution - nothing like the 1440 Mac tells me I'm getting. I've used the build HP display adjustments with no joy. HP does not have Mac drivers for this display.
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Apr 16, 2012
I have just connected an external 19" monitor to my 15" macbook pro. I am using both displays and that is fine, however I would like to be able to change the font sizes in my 19" monitor, because the default one is too small. I have to get awfully close to the monitor. I am not sure how i can display it better. When I tried changing resolution from 1440x900 to others, I didn't make it right, is that the only way? All I want is for screens in this monitor to have larger fonts (all programs, whether its safari, chrome, mail, etc). I should mention I am a brand new mac user.
Info:
MacBook Pro, iOS 5.1
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Dec 12, 2014
I have a 15 inch macbook pro mid 2010, Processor 2.66 GHz Intel Core i7.
I want to buy an external monitor to connect and work with. My question is: whats the highest resolution it will support for an external monitor.
Will it support a 2560x1440 monitor?
Info:
MacBook Pro, iOS 8.1.2
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May 17, 2009
I just started using my MacBook with an external monitor, and love this new set up. But, I have a quick question. When I hook it up, my screen looks like an enlarged version of what's shown on my smaller MacBook screen. This is okay, but I'd like everything (dock, menu bar, etc.) to be the same size as on the MacBook screen, only with extra desktop space, if that makes sense. Currently, since everything is just enlarged, I don't feel like I have any extra screen real estate - windows and the dock take up the same amount of space relative to the screen size as they do on the MacBook. My resolutions are 1280 x 800 on the MacBook and 1280 x 720 on the external monitor. I tried playing around with different resolutions but keep getting a No Signal error on the monitor when I use anything else. I know this is kind of a difficult question but does anybody have any ideas?
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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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Nov 1, 2009
I have a mbp 15" and it runs at 1200 x 800 (for example)let's say I have an external monitor which is 24" Can I run that external monitor at 1900 x 1200 (I don't know the real resolutions)would it work? If not, why? Is there a way I could make the MBP run at a higher resolution so it looks like iMac resolution?
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Aug 3, 2010
I currently have a MBP1, 1 running 10.6.4 on an external monitor with the ideal resolution at 1920x1200. From time to time, when I wake my MBP from sleep through external keyboard/mouse to have it run solely on the external monitor, it sets the display at 1600x1200, so everything seems squished vertically. After a fresh reformat, the problem persists, though it is less frequent. It's just a minor annoyance that I can't seem to find a solution to fix permanently. I usually have to go to safe mode and adjust the resolution back to normal. Alternatively, only sometimes if I put it back to sleep and wake it up again with the external keyboard, it will detect the right settings.
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Mar 7, 2012
im using a 27" imac... recently just bought a mini displayport to HDMI cable to hook it up to my 24" Benq 241 monitor.Im pretty sure ive used this monitor before without a problem on my old macbook. The monitors max resolution is : 1920 x 1200 but im only getting the option of :Â Â
1080i
1080p
720p
480i
480p
1600 x 900
1344 x 1008
.... the rest go down in numbers  selecting 1080p gives a fuzzy picture... and 1080i, is what looks liek the highest - but still really pixellated?
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Apr 6, 2012
I use an external monitor from Dell with my Macbook Pro 13.3". For some reason I am not allowed to set this monitor at highest possible resolution? Or perhaps that's the best for this monitor which admittedly is quite old. But when I go into my system preferences it shows option for higher resolutions but doesn't allow me to select one.
Info:
MacBook Pro, Mac OS X (10.6.8)
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Jul 7, 2007
I just got my MaBook Pro (2.2 GHz and nVidia graphic card). I installed Boot Camp 1.3 and Vista. I have a Benq Monitor 24" with the native resolution of 1920x1080. The MBP is attached to the monitor via DVI.
The problem is that the max resolution Vista allows me to set up for the external monitor is: 1024 X 768. I have tried the original Vista driver from nVidia, but it wont recognize my hardware. Needless to say, that under Mac OS X everything works just fine.
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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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Aug 12, 2010
I currently have a MBP1,1 running 10.6.4 on an external monitor with the ideal resolution at 1920x1200. From time to time, when I wake my MBP from sleep through external keyboard/mouse to have it run solely on the external monitor, it sets the display at 1600x1200, so everything seems squished vertically. After a fresh reformat, the problem persists, though it is less frequent. It's just a minor annoyance that I can't seem to find a solution to fix permanently. I usually have to go to safe mode and adjust the resolution back to normal. Alternatively, only sometimes if I put it back to sleep and wake it up again with the external keyboard, it will detect the right settings.
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Jun 27, 2014
I have a Samsung SB970 S27B970D 27-Inch Screen LED-Lit Monitor with native resolution of 2560x1440. When I connect it to my 2012 13" MacBook Pro via mini display port to DVI, I am unable to get anything better than 1080p.Â
Here's what System Information shows for my displays. Intel HD Graphics 4000:  Chipset Model: Intel HD Graphics 4000 Type: GPU Bus: Built-In VRAM (Total): 768 MB Vendor: Intel (0x8086) Device ID: 0x0166 Revision ID: 0x0009 Displays:Color LCD: Display Type: LCD Resolution: 2560 X 1600 Retina: Yes Pixel Depth: 32-Bit Color (ARGB8888) Mirror: On Mirror Status: Hardware Mirror Online: Yes Built-In: Yes Connection Type: DisplayPortS27B970: Resolution: 1920 x 1080 @ 60 Hz Pixel Depth: 32-Bit Color (ARGB8888) Display Serial Number: H3HCA00500  Main Display: Yes Mirror: On Mirror Status: Master Mirror Online: Yes Rotation: Supported Television: YesÂ
As you can see, 2560 should be supported.Â
Also note that we have two different MBPs and two different Samsung monitors (same model, ordered at different times) that do the same thing.Â
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Jun 4, 2014
I need to change resolution of external monitor in clamshell mode
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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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May 4, 2010
I'm in the process of replacing my MBP with an early 2k9 iMac as my DAW machine. I'm shopping around for external monitors, and I'm leaning a 27" monitor that natively displays 2048 x 1152. My question is, if I get a dual link dvi cable- will my iMac be able to display this resolution on an external monitor?
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Sep 20, 2010
I've got a Samsung LCD HD TV with the resolution 1366x768 My TV (nej means no, and ja means yes), and a Macbook Pro 13" (2010 version, 2,4 GHz). I connect those two with a standard VGA cable, but I can't get the right resolution (1366x768). I've tried to make my Macbook sleep, so my TV id the primary screen, but I can't get the right resolution. 800x600 is the lowest, 1900x1080 is the highest, and the closest to 1366x768 is something like 1340x760 (not exactly that number, but it's pretty close). Can I get 1366x768 resolution my TV when I connect my Macbook?
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Dec 27, 2008
I got a penryn MBP with up to date drivers and I just picked up a Samsung T220 1680x1050 that works fine in OS X but I can't seem to get this resolution to work right under XP. It does not show the whole screen and when the cursor moves to the edge of the screen it scrolls/pans from side to side like it doesn't fit.
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Sep 7, 2010
I have recently purchased the mini display port to DVI adapter and a Belkin DVI to HDMI cable, to plug into my MacBook & Samsung SyncMaster 2032MW monitor. However when I connect this all up the display resolution is appalling, blurry and doesnt fit the screen. I have tried all the available resolutions turned mirror-mode on & off and its still shockingly bad! Also tried this on my LG TV and still the same. I have a Dell laptop which I connect via HDMI and the resolution is amazing. I thought the MacBook would output the same?
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Jul 14, 2010
I'm thinking of getting a MBP 13'', together with an external display. That way I get the portability of a MBP 13'' while maintaining an in-house big external display and 400$ in my wallet, only losing a bit of processor power (which is found negligible by most users).
My question has to do with resolution. MBP 13'''s resolution is 1280 by 800, right? My question is: if I buy a display with higher resolution, will I be able to enjoy that resolution? Or no matter how big my external display's resolution is, will I always be stuck with 1280*800?
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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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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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