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1. Download and Install Java 8 JRE for your operating system.
2. Download the latest release of the Universal Zip from the Downloads Page.
3. Save the zip to an accessible location on your computer.
4. Uncompress the zip.  The directory that you choose will be known as the <root directory>.
5. Open a terminal and navigate to the <root directory>
6. Execute the bin/NautDrafter (Linux or OSX) or bin/NautDrafter.bat (Windows)
   
   

FAQ 

OSX

• How do I open a terminal?

• How do I use Java 8?

See http://docs.oracle.com/javase/8/docs/technotes/guides/install/mac_jdk.html

Run the java --version
If it doesn't report java 8 than the installation of java wasn't correct.
To run a different version of Java, either specify the full path, or use the java_home tool:
% /usr/libexec/java_home -v 1.8.0_06 --exec javac -version

Windows 7

• I get the following error launching nautdrafter

Image Added

Download nautdrafter_update.bat in the nautdrafter/bin directory.  Double click on nautdrafter_update.bat.