I have an iMac, iPhone 4S and iPad 4. I sync everything through iCloud. Here is the problem. I have a large list of bookmarks on the iMac not all of which do I want to sync to the iPhone and iPad. (financial and medical sites for privacy concerns if either is lost) But, I want the bookmarks on the iPhone and iPad to sync with each other. How do I keep the iMac out of the loop on bookmarks while still syncing the iPhone and iPad?