How do I stop email reminder from iCal? I'm using Google calendar, and I subscribe to my Google Calendar from multiple computers.  Whenever I set an event with (an) email reminder(s) on Google calendar, I'll get multiple emails because (1) Google calendar itself sends me the email reminder and (2) each computer that subscribes the calendar tries to send the email reminder (when the computer wakes up).  It's very annoying.
For Mac OS X Mountain Lion  10.8.0:


Click on the "Calendars" button on the main window to show the sidebar of calendars.
Right mouse click on the calendar you want to ignore alerts from &amp; choose "Get Info"
Check ON "Ignore Alerts" &amp; click "OK"


Seems as thought you don't have to globally set this preference, you can now selectively choose which calendars have alerts or not, through iCal.