Don, It sounds like the FTDI driver is not installed on your MacBook. You need to download and install the latest driver for Mac OS X (V 2.2.18).
http://www.ftdichip.com/Drivers/VCP.htm David, W4SMT ________________________________ From: Don Putnick <don.putnick.n...@gmail.com> To: elecraft <elecraft@mailman.qth.net> Sent: Sunday, December 9, 2012 11:07 AM Subject: [Elecraft] [KAT500] Please help with Mac-KAT500 interface Hi all, I'm trying to control my KAT500 via the KXUSB cable to my MacBook Pro running Mountain Lion. The only two ports I see are "Bluetooth-PDA-Sync" and "Bluetooth-Modem". The first gets "KAT500 is not responding" error message from the KAT Utility. The second gets a "Unable to open serial port" error message. Any helpful hints would be greatly appreciated. Thanks and 73, Don NA6Z ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html