OS X Mavericks :: Target Display Mode Not Working
Dec 3, 2014
I have a 21.5' iMac (Mid 2011) and a 27' iMac (late 2012) that I would love be able to use Target Display Mode. Unfortunately I have tried everything I could think of to get it to work. Here is a list of things that I have tried but have been unsuccessful at enable TDM:Â
1.) Completely restored Mac OS X 10.9.5 on the 21.5' iMac. Setting this machine up as new since it will be my external display.
2.) No firmware password enabled
3.) Reset PRAM on both machines
4.) Connected an Apple Keyboard w/ numeric keypad to the 21.5' iMac.
5.) Pressed CMD+F2 to enable TDM (no luck)
6.) Tried to enable 27' iMac as external display Â
Repeated same process with an 13in Macbook Air (Mid 2011) and got the same result. TDM will not work.Â
So I did some extra troubleshooting to try to target why TDM won't work.
I put my 21.5' iMac in target disk mode and connected it via thunderbolt with my 27' iMac but it doesn't see the 21.5' iMac while in target disk mode. I also tried the same process with my 13' MBA and I don't see the 21.5' iMac while in target disk mode.
Info:
iMac, OS X Mavericks (10.9.5)
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Aug 3, 2010
I have a November 2009 27'' i5 iMac and a 2010 Macbook Pro 15'' i7. After installing the iMac's Target Display Update 1.0 and 10.6.4, I'm no longer able to connect the MBP to my iMac. When I plug in my mini displayport cable, the iMac's screen goes black for a few seconds, then the MBP's screen flashes blue for a second or two, and then back to normal, and finally, the iMac's screen goes blue for 5 seconds or so, and then back to the desktop.
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Aug 13, 2010
I have a G3 iBook and just the other day the display stopped working. There were no signs of the display going bad, it's just went. Am I able to boot the iBook via Target Disk Mode on my PowerBook and run the iBook Hardware Test CD on it? Also, can I reboot my PowerBook and choose the iBook as the startup volume?
I know how to do Target Disk Mode but the latter I'm not sure about.
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Jun 2, 2014
Troubleshooting a broken display on a 13MBP with OSX Lion. Target is 2011 27' iMac running Mavericks.
Info:
iMac (27-inch Mid 2011), OS X Mavericks (10.9.3), Office for Mac
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Mar 5, 2012
I want to buy the 27" iMac - but only if I can use it as external monitor for my Lenovo laptop when working from home. A the Apple store in London they said that this is possible with a Belkin converter from hdmi to mini display port (with a USB power caple to turn it into an active signal). The laptop also has a displayport.
Info:
iMac
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Dec 1, 2014
I have a new 27" iMac retina display. Is there any way to use it as an external display (since it does not support Target Display Mode)?
Info:
iMac with Retina 5K display, OS X Yosemite 10.10.1
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Nov 1, 2009
Any chance of a Target Display Mode as seen in the new iMac for the MBP? Is this a hardware or software thing?
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Dec 16, 2009
So I have a Mac mini set up with Windows 7 only and then I have that connected to a 27" iMac with the miniDP cable.
At first, during installation, I have no issues; Windows is installed and drivers are done... reboot.
I start seeing artifacts, especially in dark areas (little sparkling pixels of colors--kind of like white noise except it's not everywhere and this is in color), also every few seconds the screen would flicker, and occasionally the screen would change to where the bottom of the be on top (hard to explain, but imagine a movie where the frame isn't centered and you can see the bottom of the previous frame and the top of the current one).
I figured it was an issue with the iMac, so I switched back to the iMac and there are no issues. I switch back to the Mac mini and screen is still messed up.
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Jul 5, 2012
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.Â
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Oct 23, 2010
I use a Belkin AV360 so I can play my Xbox 360 on my new 27" iMac using target display mode. it has been working flawlessly since I got the AV360 until today where I haven't been able to get target display mode to work.
I've checked it is not the Xbox 360 being the problem tested it on my housemates TV. am also pretty sure it's not the Belkin AV360 itself because in system profiler under USB devices it says the "AV360 miniDP Converter" is pluged in and say same in Windows 7 bootcamp under device manager. I also tried my laptop which has a HDMI out on it.
my laptop says there is a "Belkin dongle" plugged in, I set the laptop to use the Belkin dongle at a external display and still I can't get target display mode to work.
Normally when I turn my Xbox on it automatically goes into target display mode or I can press cmd + F2 so to switch between iMac and Xbox. I have also tested my housemates Xbox in my setup and still the same problem.
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Dec 27, 2010
I am thinking about using my iMac as an external display for my Dell Laptop listed in my sig. Most of the time at home I can work on my iMac, but occasionally I use windows, and I have the dell for that. According to Apple:
"On the 27-inch iMac, the same port offers input, too. So you can connect any external source that has DisplayPort output � including a MacBook or MacBook Pro � and use your iMac as a display."
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Oct 21, 2009
I just saw this new thing TDM, and I'm really interested, meaning I can hook up my MacBook to it and all sorts of other stuff. I've been trying to find more info on apple's site and google but there's nothing much mentioned.
Can anyone tell me what kind of cable is required? Will it eventually need like 10 adapter heads?
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Nov 8, 2009
Only the 27" iMac supports this feature. I'm seeing a lot of incorrect info thrown around the forums.
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May 13, 2012
I have a new 3.4 GHz Thunderbolt iMac and can't get Thunderbolt Target Display Mode to work with my current-model 13" MacBook Air or the current model 15" MacBook Pro furnished to me by my employer. Cmd-F2 just creates a beeping sound. I tried three different Thunderbolt cables. (They are not Mini DisplayPort cables. I have one of those from a previous model of iMac and it both looks different from the Thunderbolt cables and System Information doesn't show any change when I try to patch the computers together using it.)
All machines are fully updated to MacOS X 10.7.4 with all firmware updates applied. System Information shows that all are equipped with Thunderbolt interfaces; the Console app shows the kernel message indicating when the Thunderbolt devices are plugged in and removed; all three machines work in Thunderbolt Target Disk mode in both directions with all three cables with both Thunderbolt interfaces on the iMac.
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Jun 5, 2014
Target Display Mode display mode won't work with my imac 21.5" mid 2011. I tried both commands cmd+f2 and cmd+fn+f2 but nothing! I'm using thunderbolt cable to connect my macbook air. Why I'm can't use my imac as external monitor?
Info:
OS X Mavericks (10.9)
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Mar 26, 2012
I'm using 2 IMac 27' and one is simply used as an external display. When I wake up the computer from sleep, it works on the main monitor, however the external display still has a black screen. I have to unplug the external monitor to get it to wake up. I tried unplugging thunderbolt and replugging it in which worked the first time, but same issue again not waking up.
Info:
iMac
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May 22, 2012
My MacBook Pro does not have Thunderbolt.Â
Could it be connected to a Thunderbolt Cinema display to run via target disk mode to a thunderbolt MacBook Air?Â
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Apr 27, 2012
How do I get the G4 to not start up in Target Disk Mode?
Info:
iMac
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Jul 6, 2010
I have a 15" mbp with 10.6 Intel core duo, 4gb ram with a boot camp and ubuntu partition through parallels. The other day I was installing xcode from apple's website, which failed 3 times after downloading saying the package couldn't be expanded. I left my computer for a while and came back where i then had to log in again. it rejected my password numerous time (i'm positive it was correct). when i restarted my computer i got a kernal panic screen when the apple logo came up. it told me to restart the computer which i did. didn't work. i restarted with the osx cd to use the disk utility. when it checked the drive it found a bunch of errors, which i then tried to correct. it went for a couple minutes then told me they couldn't be fixed and i should try to back up my data and reinstall osx. i don't know how to back up my hard drive when i can't log into my account. i've tried to boot in target disk mode and copy some files that way, but the only disk the other computer sees is my windows partition- no mac partition.
i've also tried these, none of these have worked: restarting in safe mode resetting the ram and pram booting with different sticks of ram all result in a kernal panic.
my windows partition still works fine though (as much as i hate to say it) the only things I really care about on my computer are my files from school and my itunes library. is there any way i can get these files off my computer?
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Aug 24, 2014
Macbook pro just recently updated to os x mavericks, goes into restart mode frequently.?
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May 10, 2010
Is there a way to boot in Target Mode in the new Mac laptops, ie, there are no firewire ports?
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Jul 16, 2010
this isnt fully a mac problem but my windows 7 laptop cant see my g5 in target disk mode any ideas how to make it work? i have macdrive installed so even the hfs hd should show up
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Oct 18, 2010
how do you connect 2 macs via firewire WITHOUT target disk mode? i repeat WITHOUT TARGET DISK MODE.
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Oct 23, 2006
Ok well i got my mac pro and i want to target disk all my old documents over from the second hard drive, that is not the boot drive. On my power book when i did target disk mode both hard drives showed up but on my mac pro only the boot drive showed up. Is there a setting or something i'm missing? What can i do to fix it?
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Apr 27, 2008
I need some pictures from my g4 digital audio onto my macbook, so I started the power mac up in target disk mode with the firewire cable attached, and it didn't mount. I have restarted both computers, and still the disks don't show up in disk utility. Could I have a bad cable, or is something else the problem?
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Jun 24, 2009
I was convinced that I'd find an answer to this question on the forum, but even mroogle couldn't help me. I often have to use firewire target mode with my wife's MacBook (or friends' computers), and most of them only have firewire 400 ports. My new Mac Pro only has firewire 800 ports (which I find completely insane, considering the very useful FWTDM and the near ubiquity of FW400 on Macs...). Since FW400 PCI cards are so cheap (at least those on eBay), I thought it would be easier to install such a card in my Mac Pro. But the question remains: can all FW400 cards allow the target mode?
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Jul 18, 2010
I'm purchasing a new MBP and I'd like to migrate my files using target disk mode, rather than Migration Assistant. Are there any good support articles online that outline best procedures for doing this?
Transferring my documents should be pretty simple, but I just want to make sure that when I transfer my iPhoto/iTunes libraries and the like that I'm transferring the right files to reconstruct those libraries, without transferring over any old files that are unnecessary from my previous system.
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Jun 30, 2012
Is it possible to boot a macbook pro retina using an external usb3 hdd (=hdd of my previous macbook pro), and boot via target disk mode, so I can carbon copy everything to the flash memory of the new macbook ?Â
In principle it sounds simple, but does anyone know if it can really happen? Can it boot from usb3 in the first place? (it's faster than usb2 and fw800 so I don't see why Apple wouldn't support it).Â
It's important to find out before I go ahead and buy the new laptop.
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May 12, 2007
I thought having a Macbook and a PC and keeping data sync'd between the two would be easy, or so Apple et al would have me believe. So far I've not only found out that their IP over FireWire, the only feasible way to transfer the large amounts of data I have, is seriously lacking (i.e. I haven't been able to get it to work!) but also that when I try to ease my woes by connecting the Macbook as a FireWire drive in Target Disk Mode, it fails to deliver again. The first time I connected my Macbook to my PC over FireWire in Target Disk Mode, it popped up in My Computer no bother. Alright, so the only partition I could access was my XP partition on the Macbook (thank goodness I have that or I'd be right up the creek!), but I suppose it's to be expected, what with OS X and Windows having different file systems ETCETERAH.
So I'll copy all my media files to the XP partition and then copy them to my XP PC from there, I thought. Every following time I've connected in Target Disk Mode, I've received nothing but a 'removable disk' icon in My Computer which, when clicked, asks me to 'insert media'. WTF, Apple?! So not only can I not have my OS X drive show up in Windows on my PC, but now I can't even have the XP drive show up?! I didn't change anything, I didn't do anything differently, I literally just rebooted OS X to copy the files I wanted from the Apple partition to the XP one. Sorry to come across all 'angry like', it's just not the first, second, or third problem I've encountered since 'switching'. For a company who prides itself on how its products 'just work', it's becoming an eye-opening experience. However, I understand it's probably something I've done incorrectly, rather than the fault of Apple or Microsoft. So I ask you, what am I doing wrong?
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Jul 12, 2008
I'm just curious if it's possible to put my Mac Pro into TDM, connect it to my MacBook Pro, start it up holding option to choose a start-up disk, and use the Mac Pro's HD to boot up. I'd experiment myself, but the Mac Pro is packed at the moment, and I'd like to know if anyone knows for sure that it will or will not work before digging it out.
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