Sync iCloud Contacts and Calendar on Snow Leopard
Syncing iCloud to Snow Leopard is relatively simple. The information you need are your iCloud ID, usually in number identified as 1473233284, and the iCloud Server Number, usually labeled as pXX-caldav.icloud.com. To find out your iCloud ID and iCloud Server Number, you need to run Safari and sign into your iCloud account. Pick Calendar or Contacts and choose Windows —> Activity from menu...