Arduino Uno unable to detect serial port on MAC os Mojave 10.14.2 Ive upgraded to Mojave.  I've never used Arduino before.  I was given Arduino Uno.
Arduino Uno does not find any serial ports... can't load Blink example (the first step)

In blind frustration, I tried the three ports available... None of work.

I've loaded the 
CH34x_Install_V1.4.pkg
to no avail.

How do I get a serial port package that will enable serial ports in general (and more importantly for arduino)

thx,
Bruce
On a related Note: the list of things that Mojave broke is long!  To solve many problems, re-install xcode FIRST!!! and read articles on apache, there is a "new and improve" apache server embedded in mojave.
If you are using a genuino or genuine Arduino, the most common cause of this is using a USB power only cable to connect rather than a data cable. (You only need the CH34x_Install_V1.4.pkg if you are running an Arduino clone based on that chipset)

If I ran the world, the USB standard would include some way to distinguish whether it's power only or power and data without having to test it with a multimeter. I know, I know, that's crazy talk.