I recently upgraded my camera from Nikon D700 to D800. For two weeks tethering to LR 5.3 worked impeccably. The day before a major shoot I upgraded to newly released 5.4 which promised tether support for my backup camera, Nikon D 610, although 5.4 still does not seem to recognise the 610!
For the first two days of this commercial shoot tethering to D800 also worked perfectly, then started to get intermittent, and Macbook gave message that USB drawing too much power and device needed to be removed (I've external drive and camera in the two USB sockets.) Then after that it only worked sporadically for a few frames. It sees contents of camera disk, but tether is sometimes there, then vanishes.
The remaining three days of my shoot were a major headache, with me spending every evening working through LR Troubleshooting page - tried the entire page. Introduced a powered USB 3 hub, different USB cables, different Macbook…everything!
Tethering works with Mac's Image Capture, and like a dream with a trial version of Capture One.
Apple Genius Bar and they checked it out – it did the same for them, and all they could conclude was that the issue is down to LR. They connected the camera to Aperture on their own Macbook and it tethered flawlessly. I’ve had to instal this to do my tethered capture whilst this issue persists. Anyone else had this issue and how did they overcome it?