Has anyone figured out a solution to this issue yet? Did I just waste $80 to upgrade to LR6?
Are you using a Mac with ElCapitan? Lightroom and El Capitan Compatibility | The Lightroom Queen Apple changed the working interface that prevented tethering with Nikons & others.
Are you using LR version 6.5.1 or CC2015.5.1 ? The latest versions corrected the Apple created bug.
Fix tethered shooting in Lightroom
Retrieving data ...