1.

Select the event and click the Info button in the bottom-right corner of the iCal window.

In Day or Week view, you can also double-click the bar along the top of the event (where the event's start time appears).

2.

Choose how often you want the event to occur from the "repeat" pop-up menu.

To make more specific recurrence choices (for example, to have the event appear only every third week of the month), choose Custom from the "repeat" pop-up menu and make your choices in the window that appears.

3.

Choose whether you want the event to stop appearing after a number of times or after a specific date from the "end" pop-up menu.