Seems like Eclipse is having troubles. I get this message when I launch Eclipse:
An internal error occurred during: "Initializing Java Tooling".java.lang.NullPointerException
I thought I should sort out Eclipse first. I found this thread that recommends adding the 'clean' command when launching from the Terminal however that only works with Windows and Linux. I figured out the 'start-eclipse' works fine to launch but how does the 'clean' command work on mac os?