user52399: 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.

user8477: 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. 

52399: <p>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)</p>

<p>In blind frustration, I tried the three ports available... None of work.</p>

<p>I've loaded the 
CH34x_Install_V1.4.pkg
to no avail.</p>

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

<p>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.</p>
 8477: <p>If you are using a genuino or genuine Arduino, the most common cause of this is using a USB <em>power only</em> 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)</p>

<p>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 <a href="https://electronics.stackexchange.com/a/140229/171525">test it with a multimeter</a>. I know, I know, that's crazy talk. </p>
