Dual External Displays?

Is there anyway to get dual external LCD's working with the macbook? If so please let me know, thanks.

Sort of
Not really but here is a device that will simulate that
Matrox DualHead2Go
And you can read about some experiences with it here:
http://voice.firefallpro.com/2006/02/mac-mini-dual-monitors-using.html

Similar Messages

  • How To Run Dual External Displays

    Hello,
    I have a MacBook Pro 13". I am wondering if it is possible to run dual external monitors? I have the MiniDisplayPort To DVI adapter, works great with one monitor, but can I run dual? Thanks.

    You could try plugging in this USB adapter, it says you can plug in up to six per computer. If you want two externals, you should only need one of those USB adapters because the first monitor should be plugged into your superior onboard DisplayPort.
    Just bear in mind that when you use these USB adapters, the top resolution supported will be lower than the DisplayPort and also it will be a lot slower. Playing games or editing video/animation might not work well on the adapters as cheap as you want.

  • Dual external displays but different resolutions--why?

    I have a 2014 MacBook Pro Retina. I have two identical HP Pavilion 22bw monitors attached via the display ports. One has satisfactory resolution, one does not. They display the same settings. I do not understand why one looks so different.

    Hi joegage,
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    Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
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  • Problem driving dual external displays on wakeup

    I posted the following here back in February and it was archived without resolution (one other subscriber noted having this problem too). Still having this difficulty so I'm reposting ...
    I am having occasional irregularities with my Mac re-driving a dual-display setup either waking from sleep or after a normal energy-saving screen shutdown.
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    This question was never really answered but I reposted it since it was moved to archive.

  • EliteBook 8470p Dual External Display Max Resolution

    I am currently using a docked HP Elitebook with two external monitors at (1920x1200) with no issues.  I wanted upgrade to two 4k external monitors (3840x2160). Does anyone know if the Elitebook can handle this?

    Either DVI or DisplayPort will drive that resolution, though you may need to use a dual-link DVI adapter.
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  • MBP i7 and Dual External Displays

    is it possible to run 2 external 1200x1600 dvi(digital) displays from a MacBook Pro 15" i7?

    The cheapest way to do this is probably to use the mini-display port for one monitor , and a USB or firewire based video out card for the other.
    It may produce some latency issues , but if you need a cheap fix it might do the job for you.
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  • 2012 iMac 21.5 inch - dual external displays?

    I bought myself a new 24" Asus 1920x1080 monitor for Christmas.  I did this in anticipation of buying a new Mac Mini when they were released this year.  Unfortunately I can't wait any longer for the Mac Mini.  I have a video editing job that I must start right away.  So I've decided to spend the extra money and buy a new 21.5 inch 2.7GHz iMac.  Here is my problem.  It is 2 inches too tall for the useful side of my desk.  It is also smaller than my Asus monitor.  So I really want to be able to use the Asus as my main workspace, and my 47" Samsung HDTV as the video display.  I know the iMac will only support 2 displays.  My question is, will it support 2 displays not including the built-in monitor.  I would like to buy 2 Thunderbolt to HDMI connectors and leave the iMac monitor black.  Will the iMac do that?  Also, the literature says it will only support a 30 inch external monitor.  I'm assuming that it won't care as long as the resolution is only 1920x1080, but is that a correct assumption?  I don't know what to do anymore.  I already have a MBP and I can't afford to spring for a second.  Ideally I'd love to wait for the new Mac Mini, but it's starting to look like it may not come out until the next generation of Intel chips are released, maybe not even this year.  I've already been waiting since last October.  If I can't turn the iMac monitor off, I may have to buy a new desk with more clearance.  Any help would be appreciated.  Also, just to make sure, FCP 7 will run on this iMac right?  I'm sure it will, but I can't wrap my head around FCPX and I want to avoid any nasty surprises.  Thanks.

    I don't know which softwares you will use for video editing, but if I were you, I would buy the iMac 27" models instead of 21.5". It is because for 27" model, you can add RAM easily at the back of iMac. Therefore, you won't afraid for having not enough RAM. However, for 21.5" model, you cannot add RAM by yourself unless you are brave enough to remove the screen, which may damage other part of iMac.
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  • Can I use dual 24" displays as an extended desktop with my MacBook?

    I have a 2.4 GHz MacBook I purchased this summer. I was considering using it for my desktop needs, but I need to have a two-monitor extended desktop. I don't particularly care for the thought of using the notebook's monitor in addition to the 24" display. I'd rather have dual 24" displays, but in talking with the "chat" line on the store website, they said this is impossible to have an extended desktop this way. I'm stubborn and can't help but think that is not impossible with the appropriate work-around.
    Suggestions? Thoughts?
    Thanks so much.

    The only option for dual external displays on a Mac laptop is the Matrox DualHead2Go. But with a MacBook, you could only get a maximum of 1024x768 on the two montors, a completely waste of a 24" monitor IMO.

  • Mid 2010 15" MBP becomes unresponsive with black screen while plugged into external display?

    I have a mid 2010 Macbook Pro, which is 15" and has the 2.66GHZ i7 processor configuration.
    Had it for almost a year: No problems
    Until about a month ago, laptop began becoming slow to boot, crashing. checked the harddisks, were corrupted and it needed a complete re-install of Snow Leopard. Did this and it seems to be ok ALTHOUGH:
    I recently purchased a TEAC LCD TV which i have been using as an external display for my macbook, but have found that while the LCD TV is plugged in and i am using a dual-screen setup my computer and BOTH displays will quite often go black, and macbook will become completely unresponive
    This sometimes happens apparantly randomly, but mostly happens when i have been using the external display for a while (30mins+) and use the "Display all Windows" feature of OSX.
    I am connecting the macbook to the LCD TV with an Apple Mini-DisplayPort to DVD-D adaptor, which is then plugged into a DVD-D to HDMI adaptor
    (As TV has no DVD-D input and i didnt (at the time) want to spend $50 on a Mini-DisplayPort to HDMI adaptor) Could this multiple line of adaptors be causing a problem? surely it wouldnt cause the macbook to die...
    Can anybody help me? i have looked all over the internet for anyone with a similar problem with no avail.

    UPDATE: This has happened to my macbook again while not plugged into my external monitor and with nothing else plugged in to it expect a USB mouse.
    Here is a status report from when i rebooted about 15 minutes ago (Plugged into TEAC LDC, went to 'show all windows' crashhhh..) dont know if there are any clues in here:
    Interval Since Last Panic Report:  55156 sec
    Panics Since Last Report:          4
    Anonymous UUID:                    FA994096-76F6-4198-ABA6-2B55C2074E1F
    Wed Apr 27 23:52:45 2011
    panic(cpu 2 caller 0x5b9efc8f): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc0000000 0x7e705000 0x0a5480a2, D0, P2/4
    Backtrace (CPU 2), Frame : Return Address (4 potential args on stack)
    0x5aa31c38 : 0x21b510 (0x5d9514 0x5aa31c6c 0x223978 0x0)
    0x5aa31c88 : 0x5b9efc8f (0x5bc0523c 0x5bc75840 0x5bc143cc 0x0)
    0x5aa31d28 : 0x5bb0a5d3 (0x90bd804 0x7424004 0x100 0x0)
    0x5aa31d78 : 0x5bb015cc (0x7424004 0x100 0x5aa31da8 0x5b9df76c)
    0x5aa31da8 : 0x5c224965 (0x7424004 0x100 0x438004ee 0x5afc4322)
    0x5aa31ee8 : 0x5bb29250 (0x7424004 0x734d004 0x0 0x0)
    0x5aa31f28 : 0x5b9f8e23 (0x7424004 0x734d004 0x0 0x0)
    0x5aa31fc8 : 0x5b9f5502 (0x0 0x9 0x0 0x0)
    0x5aa32178 : 0x5b9f768e (0x0 0x600d600d 0x7027 0x5aa321a8)
    0x5aa32248 : 0x5afb9a25 (0xc1d00041 0xbeef0003 0x13b55680 0x71)
    0x5aa322e8 : 0x5afb9f9d (0x44ca4000 0x13b55680 0x7804804 0x0)
    0x5aa32328 : 0x5af91e0b (0x44ca4000 0x13b55680 0x7804804 0x0)
    0x5aa32358 : 0x5afb95d2 (0x44ca4000 0x13b55680 0x7804804 0x0)
    0x5aa32378 : 0x5af91418 (0x44ca4000 0x13b55680 0x7804804 0x0)
    0x5aa32398 : 0x5afb9f48 (0x44ca4000 0x7804800 0x2 0x2)
    0x5aa323d8 : 0x5af947b9 (0x44ca4000 0x7804800 0x0 0x9ea1800)
    0x5aa32418 : 0x5af92269 (0x44ca4000 0x44b86000 0x44e4a000 0x88aa700)
    0x5aa32468 : 0x5afe4ddf (0x44ca4000 0x44b86000 0x44e4a000 0x88aa700)
    0x5aa324f8 : 0x5afd65a9 (0x88aa700 0x9ea1800 0x0 0x1)
    0x5aa32558 : 0x5afd6810 (0x44b86000 0x44b8677c 0x9ea1800 0x0)
    0x5aa325a8 : 0x5afd6ce4 (0x44b86000 0x44b8677c 0x5aa328cc 0x5aa3286c)
    0x5aa328e8 : 0x5afd3aaf (0x44b86000 0x44b8677c 0x1 0x220677)
    0x5aa32908 : 0x5af9b5a1 (0x44b86000 0x44b8677c 0x13b8d940 0x5051f7)
    0x5aa32938 : 0x5afd5572 (0x44b86000 0x5aa32a7c 0x5aa32968 0x5046b1)
    0x5aa32978 : 0x5af9f8de (0x44b86000 0x5aa32a7c 0x5aa32a7c 0x5aa329e0)
    0x5aa32ab8 : 0x5afd8ee6 (0x44b86000 0x0 0x5aa32bcc 0x5aa32bc8)
    0x5aa32b68 : 0x5af9bc93 (0x44b86000 0x0 0x5aa32bcc 0x5aa32bc8)
    0x5aa32be8 : 0x56a738 (0x44b86000 0x0 0x5aa32e3c 0x5aa32c74)
    0x5aa32c38 : 0x56afd7 (0x5b02a020 0x44b86000 0xbc06088 0x1)
    0x5aa32c88 : 0x56b88b (0x44b86000 0x10 0x5aa32cd0 0x0)
    0x5aa32da8 : 0x285be0 (0x44b86000 0x10 0xbc06088 0x1)
    0x5aa33e58 : 0x21d8be (0xbc06060 0x8c135a0 0x1fd7e8 0x5d43)
        Backtrace continues...
          Kernel Extensions in backtrace (with dependencies):
             com.apple.GeForce(6.2.6)@0x5af90000->0x5b045fff
                dependency: com.apple.NVDAResman(6.2.6)@0x5b989000
                dependency: com.apple.iokit.IONDRVSupport(2.2)@0x5ac4d000
                dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5349e000
                dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x5b504000
             com.apple.nvidia.nv50hal(6.2.6)@0x5c0ee000->0x5c502fff
                dependency: com.apple.NVDAResman(6.2.6)@0x5b989000
             com.apple.NVDAResman(6.2.6)@0x5b989000->0x5bc76fff
                dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5349e000
                dependency: com.apple.iokit.IONDRVSupport(2.2)@0x5ac4d000
                dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x5b504000
    BSD process name corresponding to current thread: WindowServer
    Mac OS version:
    10J869
    Kernel version:
    Darwin Kernel Version 10.7.0: Sat Jan 29 15:17:16 PST 2011; root:xnu-1504.9.37~1/RELEASE_I386
    System model name: MacBookPro6,2 (Mac-F22586C8)
    System uptime in nanoseconds: 20724823936206
    unloaded kexts:
    com.apple.driver.AppleMultitouchDriver    207.10 (addr 0x5ab3d000, size 0x36864) - last unloaded 20288128184598
    loaded kexts:
    net.osculator.driver.OSCulatorIOKit    1.4.12
    com.apple.driver.AppleBluetoothMultitouch    54 - last loaded 20335073956689
    com.apple.driver.AppleHWSensor    1.9.3d0
    com.apple.driver.AGPM    100.12.19
    com.apple.driver.AudioAUUC    1.54
    com.apple.driver.AppleMikeyHIDDriver    1.2.0
    com.apple.Dont_Steal_Mac_OS_X    7.0.0
    com.apple.driver.AppleUpstreamUserClient    3.5.4
    com.apple.driver.AppleMikeyDriver    1.9.9f12
    com.apple.driver.AppleIntelHDGraphics    6.2.6
    com.apple.driver.AppleHDA    1.9.9f12
    com.apple.driver.AudioIPCDriver    1.1.6
    com.apple.driver.AppleMCCSControl    1.0.17
    com.apple.driver.AppleIntelHDGraphicsFB    6.2.6
    com.apple.driver.SMCMotionSensor    3.0.0d4
    com.apple.iokit.AppleBCM5701Ethernet    2.3.9b6
    com.apple.kext.AppleSMCLMU    1.5.0d3
    com.apple.driver.AppleGraphicsControl    2.8.68
    com.apple.GeForce    6.2.6
    com.apple.driver.AirPortBrcm43224    427.36.9
    com.apple.driver.ACPI_SMC_PlatformPlugin    4.5.0d5
    com.apple.driver.AppleLPC    1.4.12
    com.apple.filesystems.autofs    2.1.0
    com.apple.driver.AppleUSBTCButtons    200.3.2
    com.apple.driver.AppleIRController    303.8
    com.apple.driver.AppleUSBTCKeyboard    200.3.2
    com.apple.driver.AppleUSBCardReader    2.5.8
    com.apple.BootCache    31
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
    com.apple.iokit.SCSITaskUserClient    2.6.5
    com.apple.iokit.IOAHCIBlockStorage    1.6.3
    com.apple.driver.AppleUSBHub    4.1.7
    com.apple.driver.AppleUSBEHCI    4.1.8
    com.apple.driver.AppleEFINVRAM    1.4.0
    com.apple.driver.AppleSmartBatteryManager    160.0.0
    com.apple.driver.AppleFWOHCI    4.7.1
    com.apple.driver.AppleAHCIPort    2.1.5
    com.apple.driver.AppleACPIButtons    1.3.5
    com.apple.driver.AppleRTC    1.3.1
    com.apple.driver.AppleHPET    1.5
    com.apple.driver.AppleSMBIOS    1.6
    com.apple.driver.AppleACPIEC    1.3.5
    com.apple.driver.AppleAPIC    1.4
    com.apple.driver.AppleIntelCPUPowerManagementClient    105.13.0
    com.apple.security.sandbox    1
    com.apple.security.quarantine    0
    com.apple.nke.applicationfirewall    2.1.11
    com.apple.driver.AppleIntelCPUPowerManagement    105.13.0
    com.apple.driver.IOBluetoothHIDDriver    2.4.0f1
    com.apple.driver.AppleMultitouchDriver    207.10
    com.apple.driver.AppleUSBHIDKeyboard    141
    com.apple.driver.AppleHIDKeyboard    141
    com.apple.driver.AppleProfileReadCounterAction    17
    com.apple.driver.AppleProfileTimestampAction    10
    com.apple.driver.AppleProfileThreadInfoAction    14
    com.apple.driver.AppleProfileRegisterStateAction    10
    com.apple.driver.AppleProfileKEventAction    10
    com.apple.driver.AppleProfileCallstackAction    20
    com.apple.iokit.IOSurface    74.2
    com.apple.iokit.IOBluetoothSerialManager    2.4.0f1
    com.apple.iokit.IOSerialFamily    10.0.3
    com.apple.driver.DspFuncLib    1.9.9f12
    com.apple.iokit.IOAudioFamily    1.8.0fc1
    com.apple.kext.OSvKernDSPLib    1.3
    com.apple.driver.AppleSMBusController    1.0.8d0
    com.apple.iokit.IOFireWireIP    2.0.3
    com.apple.iokit.AppleProfileFamily    41
    com.apple.driver.AppleHDAController    1.9.9f12
    com.apple.iokit.IOHDAFamily    1.9.9f12
    com.apple.iokit.IO80211Family    314.1.1
    com.apple.iokit.IONetworkingFamily    1.10
    com.apple.driver.AppleSMC    3.1.0d3
    com.apple.driver.IOPlatformPluginFamily    4.5.0d5
    com.apple.driver.AppleSMBusPCI    1.0.8d0
    com.apple.nvidia.nv50hal    6.2.6
    com.apple.NVDAResman    6.2.6
    com.apple.iokit.IONDRVSupport    2.2
    com.apple.iokit.IOGraphicsFamily    2.2
    com.apple.driver.BroadcomUSBBluetoothHCIController    2.4.0f1
    com.apple.driver.AppleUSBBluetoothHCIController    2.4.0f1
    com.apple.iokit.IOBluetoothFamily    2.4.0f1
    com.apple.driver.AppleUSBMultitouch    206.6
    com.apple.iokit.IOUSBHIDDriver    4.1.5
    com.apple.iokit.IOUSBMassStorageClass    2.6.5
    com.apple.iokit.IOSCSIBlockCommandsDevice    2.6.5
    com.apple.driver.AppleUSBMergeNub    4.1.8
    com.apple.driver.AppleUSBComposite    3.9.0
    com.apple.iokit.IOSCSIMultimediaCommandsDevice    2.6.5
    com.apple.iokit.IOBDStorageFamily    1.6
    com.apple.iokit.IODVDStorageFamily    1.6
    com.apple.iokit.IOCDStorageFamily    1.6
    com.apple.driver.XsanFilter    402.1
    com.apple.iokit.IOAHCISerialATAPI    1.2.5
    com.apple.iokit.IOSCSIArchitectureModelFamily    2.6.5
    com.apple.iokit.IOUSBUserClient    4.1.5
    com.apple.iokit.IOFireWireFamily    4.2.6
    com.apple.iokit.IOUSBFamily    4.1.8
    com.apple.iokit.IOAHCIFamily    2.0.4
    com.apple.driver.AppleEFIRuntime    1.4.0
    com.apple.iokit.IOHIDFamily    1.6.5
    com.apple.iokit.IOSMBusFamily    1.1
    com.apple.security.TMSafetyNet    6
    com.apple.kext.AppleMatch    1.0.0d1
    com.apple.driver.DiskImages    289
    com.apple.iokit.IOStorageFamily    1.6.2
    com.apple.driver.AppleACPIPlatform    1.3.5
    com.apple.iokit.IOPCIFamily    2.6
    com.apple.iokit.IOACPIFamily    1.3.0
    Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f15
    Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
    Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
    Memory Module: global_name
    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.10.131.36.9)
    Bluetooth: Version 2.4.0f1, 2 service, 19 devices, 1 incoming serial ports
    Network Service: AirPort, AirPort, en1
    Serial ATA Device: TOSHIBA MK5055GSXF, 465.76 GB
    Serial ATA Device: MATSHITADVD-R   UJ-898
    USB Device: Hub, 0x0424  (SMSC), 0x2514, 0xfa100000
    USB Device: Internal Memory Card Reader, 0x05ac  (Apple Inc.), 0x8403, 0xfa130000
    USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000
    USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x8218, 0xfa113000
    USB Device: Apple Internal Keyboard / Trackpad, 0x05ac  (Apple Inc.), 0x0236, 0xfa120000
    USB Device: Hub, 0x0424  (SMSC), 0x2514, 0xfd100000
    USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0xfd120000
    USB Device: Built-in iSight, 0x05ac  (Apple Inc.), 0x8507, 0xfd110000

  • 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?
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    I have a new T400 (less than 1 month old) with the shared memory Intel Graphics setup and I cannot get it to work with an external display of any kind.
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  • EXACTLY what cable(s) do I need to connect my MacBook Pro (early 2011) to an external display with a 2560x1440 resolution?

    I am trying to connect my MacBook Pro (early 2011 w/ Intel HD 3000/ 384Mb) to an external display with a 2560x1440 resolution. Specifically, what cable/connections do I need to display at this resolution? I cannot get the display to work using a "Thunderbolt to HDMI" or a "Thunderbolt to DVI" connector.  Note:  I used both older and newer (uni-directional) HDMI cables on the first config, and a Dual-link DVI cable on the second config.   Apple specs state this is possible ( support.apple.com/kb/SP619 ), but I am at a loss as to how this can be done.  Thanks in advance for the help!

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  • Connecting an Air to an external display?

    When checking out with a new MBA you have the option of purchasing an adapter to connect to a DVI. However, it looks like this is a mini DVI to DVI cable, and I can't see that the new MBAs come with a mini DVI port. Why would there be an option to buy a cable that won't even fit with the computer? Or will it? I have a DVI display I'd like to use with a new MBA - is this possible? Is there a thunderbolt to DVI converter?
    Also, if I do find a display that will work with the Air, how does it work? Can I use it with the screen closed, or does the computer just go to sleep? Can I use it in dual mode, so that I can have both the Air screen and the external display working seamlessly together (not mirrored) or will the Air display automatically turn off when connected externally?
    Thanks!
    Amber

    Well, before you run off to buy anything read the documentation in the user manual to see what it tells you on P. 26.
    Thunderbolt port (high-speed data, video, and audio)
    Connect Thunderbolt-compatible devices for high-speed data transfer, or connectan external display that uses Mini DisplayPort. You can purchase adapters to connectdisplays that use DVI, HDMI, or VGA.

  • Conflicting information about external display resolution - please help!

    I have a MacBook Pro (15-inch, Mid 2009) with the non-reflective screen, Mini Display Port and NVIDIA GeForce 9400M Graphics processor.
    According to these technical specifications (http://support.apple.com/kb/SP544), the built-in NVIDIA GeForce 9400M Graphics processor supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display.
    Armed with this information, I just purchased a shiny, new DELL U2711 (http://accessories.us.dell.com/sna/productdetail.aspx?c=us&cs=04&l=en&s=bsd&sku= 224-8284&redirect=1) external display which has a resolution of 2560 x 1440. Unfortunately, all I can get out of it is 1920 x 1080 (This is the maximum resolution I can select in the monitors system preferences panel.)
    So Apple tells me this graphics card supports 2560 x 1600, but I also contacted NVIDIA directly who told me that this particular card's maximum resolution is 1920 x 1080.
    Somebody has to be wrong. Is this monitor supported? Am I doing something wrong? Do I need to send this monitor back and buy a smaller display?
    Any advice would be greatly appreciated.
    O

    Well - seeing as nobody could provide any help on this, I'll post the answer in case anybody else has the same problem.
    It turns out that the monitor's resolution IS supported by the NVIDIA GeForce 9400M, so the information NVIDIA gave me was wrong.
    The issue was the adaptor.
    A regular Mini Display > DVI adaptor can only handle a resolution of 1920 x 1080. Turns out I needed a Mini Display > DUAL LINK DVI Adapter, which is a combination of USB and DVI which provides the required resolution of 2560 x 1600.
    http://store.apple.com/us/product/MB571Z/A
    Hope this is helpful to somebody.

  • External display won't work over DVI

    I've got an ViewSonic vx2025wm hooked up to my MacBook Pro. It used to work fine over DVI, but some time ago the monitor stopped being able to detect the signal and I had to switch over to VGA (via my Apple DVI-to-VGA adapter). That works fine at the full resolution of the external display, but the image quality leaves something to be desired.
    Strangely, the external display works just fine in Windows XP via Boot Camp. Oh, the irony!
    Any ideas on how to get this working again? I dread the OS X re-install.

    Same problem here. Had a Dell 30" monitor plugged in for a long time. Suddenly stopped working yesterday. The symptoms: the Mac detects the external display and "thinks" it's got it there (I can tell because the active content of the window is gone on the laptop's screen), but the display does not successfully see the output from the Mac (it shines its orange "no signal" light).
    Restarting does not seem to help.
    I should test it with a new display cable, but am a little reluctant to do this, as the dual link DVI cables required for this monitor are so expensive, and because previous posters on this topic have tried swapping cables with no result.

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