I downloaded the trial version of Lightroom 4 onto my MacBook. It downloaded but as soon as I go to open it, nothing happens. How can I fix this?
This error usually occurs if you are not running Mac OS 10.6.8 and newer. You can find the required system requirements for Lightroom 4 at http://www.adobe.com/products/photoshop-lightroom/tech-specs.html.
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