Thunderbolt target Display Mode does not (El Capitan)

Hello

I have two iMacs (iMac (21.5 - inch, mi 2011) and (iMac (27 - inch, mid 2011).)) I used sight to connect display mode target without problem with a MF639ZM (cable Apple black Thunderbolt, 2 M).

I updated both the iMac OS X El Capitan, version 10.11.5 and... surprise! they connect more.

I already stay the PRAM and SMC several times in the two iMacs. The update of the APP Store purging any discount, I already installed all they.

In my iMac 21.5 "information from the system has a 25.1 Firmware, Firmware Version 2.1.3 the Thunderbolt Bus microphone Port. State no device connected.

In my iMac 27 "information system has a 22.1 Firmware, Micro Firmware 2.1.3 the Thunderbolt Bus Port. State no device connected.

If I connect the Thunderbolt cable the status of the link in the information system change Link Status 0 x 7 to Link Status 0 x 1/0 x 2 both of the iMac.

If I unplug the Thunderbolt the status of the connection cable in the system information changes in Link Status 0 x 7 in two of the iMac.

In the Console, if I connect or disconnect the cable Thunderbolt I can see:

IOThunderboltSwitch < 0 > (0x0): listenerCallback - HPD Thunderbolt package for road port = 0 x 0 = 2 unplug = 1

IOThunderboltSwitch < 0 > (0x0): listenerCallback - HPD Thunderbolt package for road port = 0 x 0 = 2 unplug = 0

Thus, it resembles the iMac Thunderbolt ports not work and detect the connection of the cable.

But... Command + F2 is not target display mode!  (Use all F1, F2. etc. keys as standard function key... is disable under keyboard).

I'd appreciate any help or support to solve this nightmare.

Best regards.

Looks like you've covered all the bases except try a new cable Thunderbolt.

Use your iMac as a display with the target - Apple Support Display Mode

Tags: Mac OS & System Software

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