[Elecraft] Mac utility with K3S Puts K3S in TX mode!

[Tim Tucker]

I use my K3 with a Mac and use it with both the Elecraft Mac utility and
Windows apps without problem.  I'm using an FTDI-based USB Serial converter
with it.  The first thing I would check is the type of USB Serial cable
you're using:  There have been many fake Prolific cables sold over the
years and those can be very problematic, even causing the type of behavior
you're seeing.

FWIW, I just tested the latest Mac utility and it worked fine for me.