You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: catja225
catja225 Author
User level: Level 1
8 points

Target display mode not working / iMac 27inch + MacBook Pro

#TargetDisplayMode #iMac #MacBookPro


Hi, I am trying to connect as 2nd screen my

iMac 27-inch, late 2009 running on 10.13.6 high sierra

and

MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports) on 10.15.4 catalina


I am using original cables from apple: thunderbolt 3 (USB-C) to thunderbolt 2 with thunderbolt..


command+F2 (command+FN+F2) not working. scanned forum after forum but can't find the issue / ways to fix, anyone any solution?

iMac, macOS 10.12

Posted on May 27, 2020 3:15 PM

Reply
Question marked as Top-ranking reply
User profile for user: catja225
catja225 Author
User level: Level 1
8 points

Posted on Jun 8, 2020 3:16 AM

Thank you for your help. Finally managed to connect the two!:

iMac (27-inch, late 2009) + MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)


Apple does not have the necessary cables, however, this works:

LMP USB-C adapter Mini-DisplayPort

LMP Mini-DisplayPort Cable Mini-DisplayPort

View in context

Similar questions

3 replies
User profile for user: brenden dv
brenden dv
User level: Community Specialist

May 28, 2020 10:07 AM in response to catja225

Hello catja225,


Thank you for using Apple Support Communities.


I understand that you are trying to use an iMac 27-inch (late 2009) as an external display using target display mode. I would recommend taking a look at the following support article to setup and then troubleshoot using your iMac as a display.


Use your iMac as a display with target display mode - Apple Support


Best regards.

Reply
User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
133,291 points

May 28, 2020 10:13 AM in response to catja225

You can not use the Apple ThunderBolt-3 <--> ThunderBolt-2 adapter For any displays EXCEPT genuine thunderBolt displays. it does NOT provide a workable Mini DisplayPort signal.


This adapter is not compatible with displays that use DisplayPort or Mini DisplayPort, such as the Apple LED Cinema Display. Thunderbolt and Thunderbolt 2 are not the same as Mini DisplayPort , though the ports have the same shape.

from:

About the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple Support


.

Reply

Target display mode not working / iMac 27inch + MacBook Pro

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up