With CalDAV support in Google Calendar, you’ll be able to view and edit your Google Calendar events directly in other calendar applications, such as Apple iCal or Mozilla Sunbird.

* Please take note that CalDAV only support iCal 3.x

To set up CalDAV support for Google Calendar in iCal, follow these steps:

1. Open the iCal application by going to Finder > Applications > iCal
2. From the iCal menu bar, select Preferences.
3. Under the Accounts tab, click the “+” sign to add an account. (Do not select any checkboxes in the Accounts tab.)
4. In the pop-up screen, enter the following information:Description: This will be the title for your CalDAV calendar list
   Username: This is the complete email address you use with Google Calendar (including the part after the @ sign). If you’re using Google Apps, be sure to enter your Google Apps email address.
   Password: This is the password you use to sign in to Google Calendar
5. In the Server Options drop-down, enter [ https://www.google.com/calendar/dav/ [ your Google Calendar email address ] /user ] as your Account URL.For example, if the email address used to access your Google Calendar is calendarfriend@gmail.com, the Account URL would be https://www.google.com/calendar/dav/calendarfriend@gmail.com/user

6. Click Add, and wait five to seven minutes while the initial sync takes place. (All subsequent syncs are instantaneous.)

Add secondary calendars

To view secondary calendars in Apple’s iCal, follow the instructions below for each calendar you’d like to enable:

1. Sign in to Google Calendar.
2. In the calendar list on the left, click the down-arrow button next to the appropriate calendar, then select Calendar Settings. (Alternatively, click on “Manage Calendars” at the bottom of the calendar list, then click on the name of the appropriate calendar.)
3. In the Calendar Address section, locate the “Calendar ID.”

1. Copy the email address displayed after “Calendar ID:”
2. Open the iCal application (Finder > Applications > iCal).
3. Follow steps 2-4 from the Enable Google Calendar in iCal section above.
4. Under Server Options, enter [ https://www.google.com/calendar/dav/ [ Calendar ID ] /user ] as your Account URL.(e.g. https://www.google.com/calendar/dav/munkwai.lim@google.com/user)