5 Replies Latest reply: Nov 23, 2014 10:18 PM by david.e.in.hwood
Hypersquared Level 1 Level 1 (0 points)

I have a Thunderbolt Display, which I normally keep connected as an "extended desktop" to my MacBook Pro -- no problem.


Starting today, I'm using a borrowed iMac and I had hoped to switch my Thunderbolt Display over and do the same arrangement: "extended desktop." However, the display does not come on when I power up the iMac, and clicking the "detect displays" button in the Displays Preferences window does not help.


This iMac was previously set up with an a different Thunderbolt Display in its original home, and seemed to work fine. I saw it with my own eyes. My own Thunderbolt Display still works fine when connected to my MacBookPro. It's only the combination of my monitor to the borrowed iMac that doesn't work.


Both the MacBook Pro and the iMac are running OS X Version 10.7.3. The MacBook has an AMD Radeon HD 6770M card, and the iMac is using an ATI Radeon HD 5750.



Thunderbolt Display