I have installed Nodejs on my Mac (along with the WAB dev edition download). When I double click on the startup.bat file, nothing happens other than it opening in Sublime editor window. I've reinstalled Nodejs several times, to no avail. What am I missing here?
The WAB help site give specifics for launching on platforms other than windows:
On other platforms, open the Command Prompt window, cd to the /server directory of the Web AppBuilder installation, and type node server.js. Once Node.js runs, start Web AppBuilder in the browser with http://[yourmachinename]:3344/webappbuilder. If the browser is closed, you can reopen Web AppBuilder in the same—or a different—browser as long as Node.js is running in the Command Prompt window.