On a Mac, the serial ports are listed under /dev (devices). I assume you downloaded and installed the drivers for your KUSB from here http://www.ftdichip.com/Drivers/VCP.htm And then connected up the cable.
Do you know how to open a terminal on OS X ? If so, when the KUSB cable is connected, you can check with a command that lists the devices in /dev See this page for a general understanding and example https://software.intel.com/en-us/setting-up-serial-terminal-on-system-with-mac-os-x -Kevin (KK4YEL) No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced ! On Jan 5, 2017, at 21:33, John Stengrevics <[email protected]<mailto:[email protected]>> wrote: Hi Don, The equivalent - System Information - doesn't give the Com Number. In fact, Apple tech support said I need to get it from Elecraft. If there is anyone who has set their Mac up to work with the K3S, I would appreciate your input. Thanks, John WA1EAZ On Jan 5, 2017, at 8:12 PM, Don Wilhelm <[email protected]<mailto:[email protected]>> wrote: John, I don't know the Mac, but it should be similar to Windows. Go to the Mac equivalent of Device Manager, and unplug the USB cable - see which "COM Port" goes away. Then plug the USB cable back in and observe which COM port is added. Tell WSJT-X which COM port it should use. No additional driver should be required unless the COM port shows an error. 73, Don W3FPR On 1/5/2017 7:48 PM, stengrevics wrote: Two very basic questions as I am just getting started: 1. How do I determine the COM number or Serial Port Number to enter in the Radio Tab? (I am using a Mac) 2. I only want to use the computer to operate WSJT-X, no need to control anything else. Do I need to download a driver of some kind? Thanks, John WA1EAZ -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-Set-up-for-WSJT-X-tp7625483.html Sent from the Elecraft mailing list archive at Nabble.com<http://Nabble.com>. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]<mailto:[email protected]> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]<mailto:[email protected]> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]

