OS-X Lion a step backwards: Dual Screen just a symptom...(discussions.apple.com)
discussions.apple.com
OS-X Lion a step backwards: Dual Screen just a symptom...
https://discussions.apple.com/message/17851598?ac_cid=142432#17851598
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https://discussions.apple.com/message/17851598?ac_cid=142432#17851598
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