Target Display Mode is an iMac feature allowing its monitor to be used as the display for another connected Mac.

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Targeted Display Mode using Henge Docks Vertical Dock

I have a 2012 MacBook Pro with Retina Display and a Late 2012 21" iMac. I just purchased a Henge Docks Vertical Dock, to use at home, and the plan is to pop my MacBook Pro in and then use the iMac in ...
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How to use iMac mid 2010 (21.5 inch display) as monitor

I have a late 2014 macbook pro, and i am trying to use my 21.5" iMac as just a display via the thunderbolt cable. But it doesn't seem to be working, what do I need to change to do so?
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Why is Target Display Mode via Thunderbolt so unreliable for me?

I frequently want to display my MacBook Pro 15" Retina with my iMac Mid-2011, in Target Display Mode via a Thunderbolt cable. TDM often fails on first attempt and just shows a black screen on the ...
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29 views

Particular websites blocked when using Internet Sharing

I have the following setup. I have a Macbook Pro with an external monitor plugged into it via HDMI. I then have another external monitor plugged into the Macbook Pro via a Thunderbolt to DVI adapter. ...
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Problem activating TargetDisplay Mode for Mac Mini (2014) connected to iMac 21'' (mid-2010)

I'm trying to use iMac 21''(mid-2010, Mavericks) as a display for newly purchased Mac Mini (late 2014) and I'm unable to activate TargetDisplay Mode. The devices are connected using MiniDisplay Cable ...
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75 views

2009 iMac as 2nd Monitor – Can't adjust brightness

I am trying to use my 2009 iMac 27" as a second display for my 2013 MBPr 15" (both running El Capitan). I have connected the two with a thunderbolt cable and everything is working fine except one ...
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Can I switch between multiple Macs connected to an iMac with Target Display Mode?

I have a MacBook Pro that I use with an iMac 27" in Target Display Mode, using Thunderbolt. I'm thinking of also getting a Mac Mini, and I want to run it in TDM on my iMac. Can I connect both the ...
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Target Display mode: iMac mid 2011 with MacBook Pro 2013 late not working

Hardware & OS LIST list: Mac mid 2011i5 4 GB MacBook Pro Retina late 2013 Thunderbolt Cable 2m OS X El Capitan‎ (both) I'm trying to connect my MacBook Pro with my iMac as extended display. ...
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Can I use an iMac in target display mode with an Apple TV?

Target display mode appears to require a <4K ThunderBolt or DisplayPort connection. Apple TVs exclusively use HDMI output, but Apple sells ThunderBolt to HDMI adapters. I was wondering if it would ...
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Use iMac 27" in Target Display Mode with Raspberry Pi

I have this little box called the Kanex XD HDMI to Mini-Displayport converter. It works perfectly with a lot of machines (tried it with a Macbook, PS4 and Xbox 360), but some devices don't seem to be ...
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iMac used for Target Display Mode runs really hot

I have a 2014 15" retina MBP that I've hooked up to my old 2009 27" iMac using it iMac as a monitor via Target Display Mode while the MBP is in clamshell mode. My problem is that the iMac turns ...
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Target Display Mode — Pressing command-F2 does nothing

I would like to avail myself of the target display mode. I have a brand new MacBook Pro Retnia, and I'd like to use it as a display for my Mac Pro (also brand new). I followed the instructions on ...
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Switch to Target Display Mode without keyboard

Here's my setup: MacBook --> Thunderbolt Display --> iMac 27" The MacBook is the primary computer I want to use; the iMac is the (tertiary) display. This all works just fine. The problem is, when ...
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Target Display Mode: how to automate and persist on closing laptop

I have connected my MacBook (Early 2013, OS X 10.9.4) with my iMac (Late 2012, 27 inch, OS X 10.9.4) via a ThunderBolt cable in order to use the iMac screen with my MacBook. I have two related ...
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Is it possible to have an iMac maintain target display mode even through sleep/screensaver

I want to be able to make it so that my iMac doesn't exit target display mode until the thunderbolt cable is pulled from my Macbook. I love target display mode in theory, but every time I lock my ...
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How to toggle Target Display Mode on iMac using a non-mac wired keyboard? [duplicate]

I have a new Late 2013 rMBP and a Mid 2011 iMac. I want to use the iMac in Target Display Mode so I can operate it as a second monitor for the laptop. I have two questions: I can easily turn on TDM ...
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Why doesn't MiniDisplay out work with Thunderbolt-only Target Display Mode iMacs?

I realize this is kind of an AnandTech-fu level question. Technically speaking, why doesn't a Thunderbolt iMac work in Target Display Mode with a computer that only has MiniDisplay out? That is, ...
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Strange behaviour of Target Display Mode with iMac, Mac mini and Thunderbolt display

I bought a 27" iMac and hooked it up to my Thunderbolt display. The iMac is also thunderbolted to my Mac mini. When I press meta-(fn-)F2, the following happens: The iMac screen goes dark. The ...
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Can I use my Macbook Pro Retina as extra monitor for my iMac through Thunderbolt

I just bought a new late 2013 iMac and a new late 2013 Macbook Pro retina. Also bought an Apple thunderbolt cable. Pressing CMD+F2 (enabling Apples "Target Display Mode") on my iMac lets me use the ...
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Use a Mini Displayport cable to connect a Late 2013 rMBP to a 2009 iMac?

Can I use a male to male Mini Displayport cable to connect a Late 2013 rMBP to a 2009 iMac? I want to use the 2009 iMac as a secondary display for the rMBP.
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How to share keyboard and mouse in Target Display Mode

Recently I've discovered an excellent software for MacOS, which provides an opportunity, among other things, to share the wireless keyboard and mouse between different computers. It is called Teleport ...
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Can the new 2013 27" iMac function like the Thunderbolt Display?

The Thunderbolt display is a really cool external display for thunderbolt-enabled mac laptops, but the sad reality is, all those peripherals and that gorgeous display is useless when the laptop is ...
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439 views

Boot Camp and Windows 8

I had a Retina MacBook Pro with Windows 8 already installed. I can boot from it without problems, and all the drivers Apple provided for Windows 7 works perfectly for me except one thing. I am not ...
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Can I use a iMac Late 2009 or Mid 2010 as a screen for regular PC

Im thinking about building a custom hackintosh. I currently own a late 2009 iMac, the one which theoretically support video input from mini displayport. The video card I am planning to buy has a ...
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Target iMac does not wake up with the main iMac, but works the other way around!

I have two 27inch iMacs, both 2011. When I connect iMac A to iMac B and let it sleep, iMac B's display does not wake up. However, it still shows up in the Displays and I can still play audio through ...
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How to prevent window resize when exiting Target Display Mode

Using a macbook pro, with a thunderbolt cable connecting to an iMac, and using Target Display Mode [TDM] to mirror the display. I choose the optimal resolution for the external display, which means ...
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Can a Thunderbolt iMac be used in target display mode while booted into Windows 7?

Slightly different than what I'm seeing in search: If I have my iMac booted into Windows 7, can I (via Thunderbolt) use the iMac as a target display from my Thunderbolt MacBook Pro running OS X?
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Is there any way to use a 2011 iMac as a monitor for a non-Thunderbolt PC?

With a 2010 iMac I would be able to connect an HDMI to mini DisplayPort cable from a GPU to the iMac and have the iMac act a monitor using Target Display Mode. However, after some research I found ...
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Can I use my early 2009 iMac as an external screen?

I have an early 2009 iMac (24" version). It has a mini display port in the back. Is it possible to use it as an external screen? If so, how do I do it? And can I attach all kinds of devices, e.g. a ...