I am on Mac OS X 10.9.5
I have Creative Cloud for all Adobe products.
It is BOTH greyed out and when I do the fixes a couple times, it may show up, but once I click edit in photoshop, nothing happens. So I do another fix and its greyed out again. Cycle repeats.
I'd like to add my voice to this issue. I am having exactly the same challenge. I have the latest copy of Lightroom CC 2015 installed on a Windows 10 machine. I also have the latest copy of Photoshop CC 2015 installed. I have uninstalled, reinstalled, rebooted, checked registry settings, etc to no avail. All options to Edit a photo are grey in Lightroom. It does not detect Photoshop at all.