Want to share a calendar event with friends or colleagues? You can send notifications directly from iCal. Here’s how.
Control-click on any iCal event (or right-click if you have a two-button mouse). From the contextual menu that appears, select Mail Event.
This opens the Apple Mail program and prepares an email message with the iCal event attached. The subject line and text field are already filled in, though you may change them if you like.
Enter the email addresses of your recipients, then press Send. When the recipients open the email, they’ll see the name, date, and time of the event. And if they’re using OS X, they can simply click on the attached iCal event to add it to their own calendars. When they do, their copy of iCal opens, and a pop-up prompts them to choose a destination calendar for the new event.