27" runs hot in target display mode

Anyone else notice this..I use my 27" imac in Target Display Mode for my Mac Pro only and for some reason the fans slowly ramp up..especially the cpu unit to at least 1500. I find this odd as no processing is done and I doubt the GPU is used either. After using a 24" ACD that was perfectly quiet I find the fan noise somewhat obtrusive. I have the smc update installed and tried reset. Any thoughts ?

Do you have a mid 2010 iMac if so that computer does not have Thunderbolt, this was released in May 2011 for the mid 2011 iMacs. Please clarify exactly what computer you have and the cables you are attempting to use.

Similar Messages

  • HT3924 can i use iMac keyboard and mouse when it is in Target Display Mode and attached to my MBP?

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    What I really want is for the keyboard and mouse of my iMac to also operate as if they were attached to my MBP, but I cant seem to achieve this.
    Is it possible?

    Its a wireless mouse and keyboard - dont think I can re-pair the keyboard to MBP since I need it talking to the iMac to enable and disable TDM?
    I expected TDM to natively pass through the mouse and keyboard to the MBP, since that is the obvious user requirement. But this does not happen.
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  • Running Dual iMacs in Target Display Mode

    When a 'slave' iMac is connected to a 'master' iMac via Target Display Mode, does the slave iMac go to sleep (and wake-up from sleep) in sync with the master iMac (just as if the slave was a Thunderbolt Display), or is it necessary to press "Command (⌘)-F2" on the slave every so often to keep the two machines operating via TDM?
    There's a thread here http://forums.macrumors.com/showthread.php?t=1499682 that suggests that putting the master iMac to sleep will exit the slave iMac from TDM. Although point 15) on the Apple documentation states that the machines will stay in TDM after sleeping http://support.apple.com/kb/HT3924?viewlocale=en_US#15
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    Click here and check the requirements. The source computer only needs to have a Mini DisplayPort or Thunderbolt port to be compatible.
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  • Apple Mini DVI to DVI Adapter to connect Win7 tower to iMac / Target Display Mode

    I currently run Windows on bootcamp on the iMac (Mid-2011), although the tasks I perform (3D modelling, rendering and such) cause the Mac to get very hot, and as a result hae a slight burn mark on the LED LCD screen.
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  • Unable to adjust backlight in target display mode

    Hi. I am using my 27" iMac as a display on my windows computer and i can nolonger change the display brightness with F1/F2 on the imac keyboard.
    After a bit of reading ive discovered that its a fault introduced in 10.6.8 that seems to not be addressed.
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    I've tried rebooting, using a USB keyboard plugged into the iMac, every suggestion I can find on the forums, and every option I can think of and nothing works.  Like merve0o0's, my iMac is also running very hot, but the brightness is the bigger problem for me.  It was giving me a headache after a while.  I even tried sunglasses. 
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  • Can windows 8.1 in boot Camp display in target display mode on an IMac?

    I have given up on Windows 7 running in Boot Camp on my 15" MacBook Pro and displaying it on my 27" IMac via thunderbolt and Target Display Mode. 
    The FAQ concerning Target Dsiplay Mode farily clearly says Windows 7 won't work. 
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    Thanks in advance!

    no, tdm doesn't work under bootcamp regardless of which windows is being used, imho i don't think it will ever work under bootcamp

  • Target Display Mode not working iMac 27(2012) Bootcamp to iMac 27(2013)

    Hi All,
    I recently purchased an iMac 27" 2013 which replaced my iMac 27" 2010.
    ===============
    PREVIOUS SETUP
    ===============
    (1) iMac 27" 2012 - Running Windows 8.1
    (2) iMac 27" 2010 - Running OS X Mavericks
    (1)+(2) were connected with a Mini-Display-Port cable.
    (1) was using (2) as external display while (2) was set to Target Display Mode using CMD+F2
    ==============
    CURRENT SETUP
    ==============
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    If (1) and (2) are both running OS X all works as expected.
    I am aware about the support hint from Apple where they state TDM is not working under Bootcamp.
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    "Apple has no plans to implement a client driver for Windows since there is no Thunderbolt SW stack available for Windows like there is for Display Port."
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    Have you asked Apple about that? I dont understand why Apple is crippling Thunderbolt on their devices...

  • 2008 iMac - Target Display Mode?

    Hi!  I am a little confused it looks like newer versions of the iMac 2009+ support target display mode but I can't find any info on older iMacs.  I have a 2008 iMac that has a mini DVI on the back and a 2010 MacBook Pro with mini displayport.  My question can I use the iMac as a monitor for my MacBook Pro?  Can I take a mini displayport cable to DVI and a DVI to mini DVI to the back of the iMac?  Or is the mini DVI on the back of the iMac an output only?  If so does it allow you to use a second monitor?
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    I hear you - I'm trying to make it 4 (at a little over 3 right now) because I have some camera gear I want to buy first.  My iMac has been crawling a bit lately especially when running Aperture.  Just did a fresh Lion install this weekend and it seems to have improved.  Was thinking about getting a super beefy Mac Mini and a 27" Cinema Display instead of an iMac next time - that way I can upgrade sooner and not feel so bad about it.  Keep the Cinema Display and replace the Mac Mini every 3.  Else bite the bullet and get a Mac Pro - but not sure I want a giant cheese grater

  • No sound on iMac in target display mode

    I've got a late 2009 27" iMac running Yosemite.
    When I connect either my MBP (Yosemite, late 2011 15") or my wife's rMBP (Mavericks, 2012 15") to the iMac using a mini Display Port cable and switch the iMac to target display mode using Cmd-F2, sound no longer works.
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    Thanks

    Humm... I might go TosLink between the iMac and the FastTrack and then run the USB connection to the MacBook Pro when your using it in Target Display Mode.
    Or vise Versa, leave the USB connected to the iMac and use the TosLink connection for the MacBook Pro.
    See > NewerTech CBLAOPTMT Toslink to Mini Toslink Optical... in stock at OWC

  • How do I get Windows 7 to display in Target Display Mode on IMac

    I am increasingly frustrated by my inbability to get my Mac Mini running Windows 7 to display on my late 2013 27" IMac using Target Display mode.
    My setup:
    1.  IMac 27" Late 2013 running OSX 10.9.2 with all the latest drivers as of Mar 7, 2014.
    2.  Mac Mini Server Mid 2011 running Windows 7 SP1, 64bit, all the latest Windows drivers as of 3/7/14, using the latest BootCamp Drivers for this machine, ver 5.1 downloaded 3/5/14 to this machine using Boot Camp utilities in its OSX mode.
    3.  Connected via Apple Thunderbolt cable.
    My process is as follows:
    a. Turn on the IMac, boot up in the  normal manner, preparing it to run in Target Disk Mode in OSX.
    b.  Turn on the MacMini boot up via BootCamp,  in the normal manner in to Windows 7.
    c.  When Both machines are on and connected via their Thunderbolt ports, I enter cmd-F2 on the IMac keyboard to enter Target Disk Mode.
    Nothing happens.
    I use this IMac to display my MacBook Pro in OSX, so I know it is working, but I can't see where the problem is.
    I have reviewed all of the Apple support information and followed it explicitly, to no avail.
    When I have called the Apple support team, I get little help, they assert that they can't troubleshoot because it is not all Apple hardware/software (everything including the Thunderbolt cable is Apple except for the Windows OS)
    Any suggestions will be welcome...
    Thanks!

    I have finally achieved some clarity on how Target Display Mode works, or rather doesn't work.
    And I have been mistaken in some of my prior comments.
    Target Display Mode is a function of the host machine, at this point only the IMacs.  And it is only available when the host machine is running OSX.
    But the most recent Thunderbolt versions of the IMac have been significantly dumbed down in this functionality.
    The prior generation of IMacs whose video was supported through the Mini Display Port supported almost any input from a Mini Display Port compliant Computer through the use of various mechanical adapters, and certainly from any Mac Hardware or software combination.  It was a very versatile setup, and the IMac in this manner could serve as an absoloutely beautiful monitor for a wide variety of hardware/software combinations.
    When the current version of the IMac was deployed using the Thunderbolt ports for input for external video, we apparently left a world of standards based video input and entered the world of Apple proprietary video. 
    The current model of IMacs with thunderbolt video have a very limited functionality in Target Display Mode compared to those of us who have used it previously. and it only functions when the client machine is running OSX. 
    No other video input from any source will display. 
    I am not quite clear on the reasons one would want to display OSX on an OSX native machine, but you can do it.  I guess MacBook Pro or Air running OSX will now display on the IMac if that is your need.
    Likely the most likely need for Target Display Mode for the rest of us is to run Windows on an external machine and display the video on the IMac, as we have been able to do with the prior generations of IMacs for several years now.
    Apple has been unwilling to distribute the technical specifications of its video input requirements in Target Display Mode, (other than to assert it requires OSX), and these technical specifications appear to be proprietary. 
    I have personally unsuccessfully  tried to  display the output from both Windows 7 and a Windows 8 machines running from a Windows thunderbolt port into  a thunderbolt port on a current model IMac using Target Display Mode.
    Unfortunately, there are still a few applications that won't work in Mac world and require a native Windows machine.  My current need is to run Dragon Naturally Speaking via Citrix to a remote Citrix server and a Windows app.  Parallels and VMWare Fusion do not work, nor does the OSX version of Dragon Dictate function via Citrix.  So I am stuck.
    I hope that Apple, so long a leader in technology, will restore the functionality it abandoned when it embraced thunderbolt as its only video iniput in Target Display Mode.
    Thanks!

  • Disable sound on imac in target display mode

    Have a question about disabling the sound.
    I have a MacBook Pro connected to my iMac by the thunderbolt cable. I enable the target display mode on iMac with a script for disabling some configurations on iMac ( including the bluetooth for mouse and keyboard steal ).
    I set the sound output in the MacBook Pro to the iMac DisplayPort.
    The problem is now i have both outputs on iMac speakers. i want to disable all sound from iMac but keep the output from MacBook Pro on iMac speakers.
    Is this posible?
    Thanks.

    Humm... I might go TosLink between the iMac and the FastTrack and then run the USB connection to the MacBook Pro when your using it in Target Display Mode.
    Or vise Versa, leave the USB connected to the iMac and use the TosLink connection for the MacBook Pro.
    See > NewerTech CBLAOPTMT Toslink to Mini Toslink Optical... in stock at OWC

  • Audio on iMac in target display mode.

    Here's my problem:
    I have a macbook pro with retina display that is hooked up to an imac via thunderbolt. The imac is in target display mode so that I can use it as a second monitor. I have some external speakers attached to the imac which I use when I'm using the imac by itself. I'm trying to make it so that I can use these speakers when in target display mode.
    When in system preferences I can set the sound output to the imac but the audio plays through the internal speakers instead of the external. Anyone know a way to make this work?
    Thanks in advance!

    Humm... I might go TosLink between the iMac and the FastTrack and then run the USB connection to the MacBook Pro when your using it in Target Display Mode.
    Or vise Versa, leave the USB connected to the iMac and use the TosLink connection for the MacBook Pro.
    See > NewerTech CBLAOPTMT Toslink to Mini Toslink Optical... in stock at OWC

  • Brightness iMac in target display mode: who has it working in 10.6.8?

    "With Target Display mode, you can use your iMac (27-inch, Mid 2010) or  iMac (27-inch, Late 2009) with Mac OS X as an external display.": http://support.apple.com/kb/ht3924 . "Use the keyboard of the 27-inch iMac to adjust display brightness and sound volume and to control media playback of applications running on the 27-inch iMac in Target Display mode."
    This used to work perfectly for me. But under 10.6.8, the brightness control stopped working. Sound and media control still work as expected. I posted before on this.
    Now I know more people are experiencing this problem... I am looking for people who DO have it working under 10.6.8!
    I'm looking for anything I can do to get it to work, maybe the info from people who have it working gives me some clues.
    Lion is just around the corner. Please let me know if Lion fixes this problem for you.
    Thanks!
    Maarten

    I'm using two 27" imacs  and one of them is still on 10.6.8 one has been upgraded to Lion just now.
    I thought it was the Lion update which caused this issue for me because I installed  10.6.8 on both of them today as well.
    Now I can't adjust the brightness in target display mode on either  27" imac.... worse that that it sets it to full brightness too.
    I don't know of I want to try to go back to before 10.6.8 with time machine,  talk about gutted ?
    can you use monitor calibration as a work around ?
    I found TS3919 but it doesn't work BTW , it says to set the brigthness before entering target display mode..
    Simon

  • Enabling target display mode

    I am running a new 27" iMac and a MBP 17", both running 10.7.4. Both have Thunderbolt ports. I bought a thunderbolt cable and wish to use the iMac as an external screen for the MBP - Target Display Mode. I have connected both togther via the thunderbolt cable and used Cmd-F2, but nothing. System Information identifies the Thunderbolt ports (2 on the iMac) and nots No Devices Connected.
    Cannot make it work.
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    Thanks - Lawrence

    Bingo! Thank you... The problem was that I use a Matias Tactile Pro keyboard, I do not get on with the Apple keyboards, I like a full-throw key and the Alps keyswitches provide a good solid feed-back - I am twice as fast on the Matias as on the Apple keyboard.
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    Lawrence

  • Broken Graphics card Target Display mode

    I have a 2009 iMac that now has a faulty graphics card, the computer crashes once photoshop runs.
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    I purchased a Belkin AV360 and it did not work with Target Display Mode on my new mid 2011 iMac.
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