This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Actually, OS X is not Linux-based, but it is a UNIX variant (based upon FreeBSD code if I understand correctly). The only environment variable I recall setting up was JAVA_HOME which was set to /Library/Java/Home.