John, your post is confusing to me. but, I will try to answer you...ha<br>Your home folder contains all the info you want to save, everything you have done and put into your Mac (except the applications) Nothing will be lost when you install Tiger. For ical, all will be saved along with the subscriptions to any other ical calendars (holiday one for example)<br>All .mac does is save the bookmarks, calendar info, etc on .mac in case you are on a different computer and want to access the information...or if you want to sync another computer to get that information. It is like a copy of what you have on your mac already.<br><br><br>For Mike