Running mac OS 10.9.4 lightroom 5.6
Nikon D7100 and D5100. None is recognized by tethering. No problems with downloading pictures where each camera is correctly identified.
Tried all steps in Lightroom help with no result.
Is this the list of steps that you have tried?
Troubleshoot tethered capture in Lightroom
Yes these are the steps I tried. all of them.
Retrieving data ...