not to my knowledge.. OJ wiki is down at the moment, it would be the first stop to look. anyway, it's easy:
- download latest OJ-Installer-*.jar
- doubleclick it in Finder
- follow the instructions
- after finished install find OJ on your desktop
- you can move it to /Applications if preferred
alternatively use OJ portable
- download OJ-Portable-*.zip
- extract
- run OJ-Folder/bin/OpenJUMP (with icon) or OJ-Folder/bin/oj_macosx.command
..ede