OpenDJ software depends on the Java environment more than it depends on the underlying operating systems. OpenDJ directory server relies on Java 6, specifically at least the Java Standard Edition 6.0 (Sun version 1.6.0_10) runtime environment. ForgeRock recommends that you use at least version 1.6.0_27 due to security fixes. To build applications with the OpenDJ LDAP SDK, you need the Java SDK as the runtime environment has no compiler. That said, OpenDJ has been validated on the following operating systems. Apple Mac OS X 10.7 Linux 2.6 Microsoft Windows Server 2008 Oracle Solaris 10 OpenDJ DSML gateway has been validated on Apache Tomcat 6.