Apple has changed the way calendars sync in Mavericks. Here’s how to sync your Apple Calendar App with an existing Google calendar. You can’t use an iCloud based calendar to sync with Google. You need to start from Google and go the other way. Apple can see the gmail calendar but not the other way round.
A very simple way to share your calendars across multiple macs and your iphone or ipad is to use Google calendar. Here’s how to set it up on a macintosh computer.
Well as great as the iphone is, the software is lagging a fair way behind and calendar syncing is one example.