IMac :: Unable To Use Target Display Mode
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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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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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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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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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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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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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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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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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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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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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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May 8, 2009
I have an iMac G3 that I suspect has a bad hard drive and am trying to recover a few remaining files from it but cannot seem to access the hard drive no matter what I do.
I got a FireWire and am trying to start it up in target mode. It's connected to my MacBook, but when I power it on with the T key down, it starts to boot up for a few seconds but then shuts down to a black screen.
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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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Apr 14, 2012
I have a iMac PPC and a iMac intel. Can I install OS 10.4 from a DVD in the intel iMac running Snow Leopard to the iMac PPC in target disk mode?
Info:
iMac, Mac OS X (10.5.8), PPC G5
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Mar 17, 2010
I just attempted to transfer my files from my old powerbook G4 15" to my iMac 20" using Target disk mode. First I tried to use a firewire cable but it didn't work, I think I was using a 400-400 instead of a 800-400. So I used the option to connect to two computers over a shared internet connection using a password. I thought It would automatically transfer my photos and other files but it just transferred these weird extensions for applications and I don't recognize any of it. To make it worse, I tried to open photoshop on my iMac and now its asking for a password! None of the photoshop series would open, it's asking for a serial number. I had photoshop installed before and the guy doesn't live in my state who installed it for me and I don't have any of the original disks. I know Dell does system restore but Macs work differently. I wish I could undo this whole mess, I need photoshop!!
I dont have the original OS disk either, ughh I should have just splurged on a portable hard drive.
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May 12, 2010
I just bought an 800 MHz iMac G4 , and whenever I try to boot into target disk mode it shuts itself down. I am connecting to an intel iMac, and the g4 has no OS installed on it (I am trying to install tiger using my dvd install dvd, the one with the black background and grey x which the G4 won't read). Does anyone know what could be causing this issue? I've already tried reseting the PMU and PRAM.
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Sep 10, 2014
My iMac won't boot up. I think its HDD is dead . Is there a way for me to use target disk mode to boot from my laptop HDD so that I can rescue my iMac HDD?
Info:
iMac, Mac OS X (10.6)
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Jan 9, 2009
G5 iMac model A1058, 1.8/512mb/160gb.Bought this machine used on e-bay with no operating system, powers on fine, flashing folder with question mark= no operating system. Tried to connect to my i-book in target disk mode via fire wire and the hard drive does not mount on the desktop. Can't find it in disk utilities however i get this in system profiler under firewire.
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Aug 21, 2014
I'm trying to sort out a problem with a mid-2007 iMac. When trying to start it up normally it would get past the Apple screen, then go onto a blue screen with a cursor and stay there.Â
I made a bootable Snow Leopard USB drive to try and repair the disk / re-install the OS. Plugged in the USB drive, and tried to boot the iMac into startup manager by holding down the option key. But instead of showing the volumes to launch startup manager, it keeps bringing up a grey screen with the Firewire logo on, which I believe is what happens when launching into Target Disk Mode.
Info:
iMac
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Aug 23, 2014
Can you do a target disc mode through a usb male to male cable? I want to Sync exactly my work files from my iMac to the MBP for when I go away. The best way I've found to do that is to use a free app called SyncTwoFolders. Â
It means you can copy your work between two computers go away with one and work for a few months come back and sync it with the other and vice versa. To do this you need to connect two computers. My iMac has Firewire and USB. The MBP has USB and Thunderbolt. USB to USB doesn't seem to work.Â
What cable should I buy to do this? Firewire to Thunderbolt? Firewire to USB? USB to Thunderbolt?
Info:
MacBook Pro (Retina, 15-inch, Late 2013), OS X Mavericks (10.9.4)
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Feb 3, 2006
We have some new Intel iMacs and have transferred some information from our previous G4 PM (one MDD and one Quicksilver) to the new iMacs. For some reason the G4's will now not boot up and kernal panic on the gray Apple boot screen. This has happened to all the G4's we have in our office. They are running OSX 10.2.8 and the iMacs are running OSX 10.4.4. We can still mount the drives from the G4's using FireWire Target Disk mode.
I have tried zapping the PRAM etc but they still wont boot. I have also tried running the OSX 10.2 Installer disks to try and reinstall OSX on the G4's but the installer cannot see the drives?
I tried running the disk utility. It finds the hard drive but wont let me verify/repair permissions (the option is grayed out). It will only let me verify/repair the disk, but it finds no errors. The installer cannot find the disk at all.
We have more than one hard drive in the G4's and the target disk mode will only mount the system drive, it doesnt see the others, so we cannot retrieve out information. Whats going on. Never had this problem before.
Anyone have any idea what is wrong. Never had this problem before using the FireWire transfer.
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Dec 14, 2009
I'm traveling at the moment with my MBP 17". Arrived at my friends place who has a base iMac 21.5". Since I prefer to use the slightly larger screen to work off (even though my 17 MBP has more pixel density). So startup the iMac via TDM on my 17 MBP and to my surprise it works! - as my MBP only has leopard 10.5.8. I would have thought these iMacs would not run unless you have SL 10.6 loaded. It worked the 1st time, but crashed (grey vertical shade of death) twice after. On the 4th time it worked again. So that was weird (the inconsistency). Maybe 10.5.8 is NOT meant to be compatible with the new iMac's?
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Mar 28, 2010
I have my pbook g4 in target disk mode and I am trying to make a superduper backup but I get "Error starting permissions repair for disk1s3 Powerbook-G4-#1: Operation not supported for the Mac OS X version on the targeted disk (-9950)".
Disk utility doesn't have repair permissions enabled. So, I 've only done a repair disk on the target disk which a journaled hfs+.
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Jun 13, 2012
First thing to say is that the G4 starts fine (remarkably quickly in comparison with the new iMac) and appears to run okay. However, on running the disk utility I’ve found that there is a problem with the hard drive and it won’t verify either the hard drive or repair the permissions. Like many of its kind the optical drive has failed and therefore I can’t use the installation CD to reinstall or anything else. My daughter has been using the G4 for some years but has upgraded to MBP and wants me to take her files and put them on another hard drive and then wipe the G4 clean. At the moment the disk utility will not work at all. So I’ve been attempting to start it up in TDM via FireWire. The G4 starts up okay in TDM (the FireWire symbol appears on the screen) but there is no sign of it on the new iMac. In the light of what I’ve said so far does it seem probable that I will ever be able to get the start-up disk to work? I have connected the two computers via a Wi-Fi network and have been able to see the disc but when I have run the disk utility it has always reverted back to the G4’s own program.
Info:
iMac, Mac OS X (10.7.4), 24" Late 2009
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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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