I have an old imac 27 ' with mac os 10.7.
I try creative cloud and lightroom 5. It works perfectly... But what will happen with lightroom 6 ?
It's pretty simple. Lightroom 6 will not run on OS 10.7. See http://blogs.adobe.com/lightroomjournal/2015/01/update-on-os-support-for-next-version-of-l ightroom.html
You will need to either stay with Lightroom 5, or upgrade your operating system.
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