How do I transfer calendars from icloud to my macbookpro

If it's running OS X 10.7.5 or later, sign into your iCloud account in System Preferences>iCloud and check Calendars. If it isn't, download the calendar from icloud.com as an ICS file by doing the following:

1. Go to iCloud Calendar at iCloud.com and sign in with your iCloud Apple ID.
2. Publicly share a calendar.
3. Copy the URL (web address) of the shared calendar and paste it into the address field in your browser. Do not press Enter or Return yet.
4. Change "webcal" to "http" and press Enter or Return. An ICS file will download to your default download location.
5. Add the calendar to a calendar client such as Calendar or iCal on a Mac, or Outlook on a Windows computer.
6. Unpublish the shared calendar.

Then import the ICS file to iCal on your Mac.