> The requirements to build the jigsaw source, basically wrote you wrote below :-) plus i presume Java 7u4 to bootstrap. Yes http://openjdk-osx-build.googlecode.com/files/OpenJDK-OSX-1.7-x64-u4-jdk-jdk7u4-b19-20120406.dmg export LANG=C export ALT_BOOTDIR=`/usr/libexec/java_home -v 1.7` export ALLOW_DOWNLOADS=true make sanity make all :-)