Mac OS X 32 bit support was provided by bug 369660 Java SE 6.0 or higher will be required.

With the dependent bugs fixed, JSS builds and passes QA on Mac OS X 64 bit provided the build is done by setting export USE_64=1 export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home or export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home export PATH=JAVA_HOME/bin:$PATH build NSPR/NSS/JSS and then run perl all.pl dist ~/tip/mozilla/dist/Darwin9.6.0_64_DBG.OBJ/ if you use java 1.4.2 it will report errors. closing bug as fixed. good page to read for java 64 bit support on Mac OS X. http://developer.apple.com/java/javaleopard.html