I tried to compile and get the following error message:
-do-compile:
[javac] Compiling 21 source files to /Users/reivilo/Downloads/arduinox-master/build/classes
[javac] javac: invalid target release: 1.7
[javac] Usage: javac
[javac] use -help for a list of possible options
There was another nice project called Cocoduino (forum, GitHub).
Are you using the same approach based on ino (website, GitHub)?
You can even use Xcode, the excellent and free IDE provided with every Mac. Check the embedXcode project (website, download, forum!