How can I get a script to run every day on Mac OS X?

For reference, all 3 options would work. The iCal option however has more limitations than the others. (There are GUIs for editing cron and launchd as mentioned in other answers) Cron is the most straight forward and well known and there are many tutorials available. The Coles Notes is to add the last line from below to your crontab (either by editing or using on the command line): In Mac OS X, has actually been replaced by but is backwards compatible with meaning you can still use but it's act…