I shoot tethered with my 5D3 and have done for ages with no problem. However today when I try to use tethered it says no camera detected. The odd thing is I can import photos from the camera, so it can communicate with the camera, just wont let me use it tethered. Anyone know what's gone wrong?
What EXACT version of Lightroom and Operating System are you using?
Are you using a version of Lightroom prior to Lr6 with and Apple El Capitan or Sierra. If so this is a known problem and the only solution is to upgrade to Lightroom 6.7
Sierra 10.12 and LR 5.7.1 and camera raw 8.7.1. Weird thing is it was working fine with this set up last week??