You can make Eclipse 3.1.2 run on an Intel Mac system by patching the installation.
1. Install Eclipse 3.1.2 on your system.
2. Download the file:
http://www.weinand.org/eclipse/org.ecli ... .0.jar.zip
3. Extract the jar file from the zip archive.
4. Rename it from:
5. Copy it over the file with the same name in the eclipse/plugins directory.
Now you can start Eclipse.
(The recompiled plugin was posted here by its author, Andre Weinand: https://bugs.eclipse.org/bugs/show_bug.cgi?id=98889