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Q: I upgraded my 2010 iMac to yosemite  from snow leopard and my additional 24" cinema display is no longer recognised.

I have a late 2009 27"iMac  (3.33 GHz intel core duo, 12GB RAM) and upgraded from snow leopard to yosemite,   It now longer recognises my 24" cinema display which i use as an extended desktop.  Any fixes or do I need to go back to an older operating system?  If I do can I go back to iPhoto as well as I think it is far better than Photos.

iMac, OS X Yosemite (10.10.5), late 2009 27" imac 12GB 3.33GHz co

Posted on Jan 12, 2016 10:39 AM

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Q: I upgraded my 2010 iMac to yosemite  from snow leopard and my additional 24" cinema display is no longer recognised.

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