How did you install Transporter? It worked for me after doing the following:
I downloaded Application Loader 3.0 from iTunes Connect (iTunes Connect > help menu > All Resources and Help > View Tools > Application Loader 3.0).
I installed it in the standard place.
I ran Transporter from within Application Loader.
$ /Applications/Application\ Loader.app/Contents/MacOS/itms/bin/iTMSTransporter
It whirred for a long time installing stuff then printed its usage.
usage: iTMSTransporter [-help <arg> | -info | -m <arg> | -version] [-o <arg>] [-v
<arg>] [-WONoPause <arg>] [-Xmx1024m]
…
Transporter comes with its own Java, so you shouldn’t need to install that separately. Notably, I have no standalone Java installed on my system:
$ java
No Java runtime present, requesting install.
Share and Enjoy
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Quinn "The Eskimo!"
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
let myEmail = "eskimo" + "1" + "@apple.com"