Dual Thunderbolt displays got problem after upgraded to 10.7.4

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warren2012 Author

Level 1

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Dual Thunderbolt displays got problem after upgraded to 10.7.4

I have two TB displays(fw updated) and MBP 15inch Early 2011, osx 10.7.3 server

Dual TB displays can work.

I upgraded my osx from 10.7.3 to 10.7.4 yesterday, than my 2nd thunderbolt display cannot work.

I try to swap the position of the two TB displays and unplug/plug TB cables, got same problem, only the 1st TB display works normally.

anyone got same issue ?

MBP--------TBD(1st)------------TBD(2nd)

(10.7.4)------(work)--------------(not work)

My MacBook Pro (15-inch Early 2011), TB fw updated.

Processor 2.2 GHz Intel Core i7

Memory 4 GB 1333 MHz DDR3

Graphics AMD Radeon HD 6750M 1024 MB

Mac OS X Server Lion 10.7.4 (11E53)

Thunderbolt Display (27-inch), Mac OS X (10.7.4)

Posted on May 11, 2012 8:00 PM

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Answer 1

X423424X

Level 6

14,265 points

May 12, 2012 2:22 AM in response to warren2012

I've seen four reports (so far) of people having display problems after the last update. In all their cases they had a external monitor which showed up in the Displays preferences with only two (incorrect) resolutions. In all cases all these people did was update thier working systems.

Although yours is a different problem I am beginning to suspect that update affected video in a number of adverse ways. I think all you can do at this point is revert to a system prior to the last update and wait for some future update. Perhaps send feedback to apple.

imac only has 2 resolutions

Can you help me recover my screen resolution options in system preferences?

These were not even Thunderbolt related.

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