We suggest you see the KB article for OSX 10.9 Mavricks for important information.

Please also see this article if you encounter a "You can't open the application "spot" because PowerPC applications are no longer supported" error.

Spot requires Java version 1.6 AND 1.7. We advise you to install Java 6  and 7 before installing Spot if you do not already have them. Please see http://sohelp2.ipac.caltech.edu/support/index.php?/Knowledgebase/Article/View/238/ for directions on download Java 6 and 7.

If Spot or Leopard will not open after an auto-update please see http://sohelp2.ipac.caltech.edu/support/index.php?/Knowledgebase/Article/View/238/#javaapplicationstub