Nikon D7000 Firmware UpdateNikon D7000 Tethering Software Mac ProFree software tethers Nikon dSLR to computer. Nikontrol 3K was developed using the Nikon SDK and users simply have to connect the camera to a computer via USB to start tethering.It lets you convert M4P and Audible AA files as well as extract audio from iTunes movies, TV shows and podcasts, and save them in common audio format inclu..