Can two or more people share the same iBank data?

iBank is intended for single-user operation. Generally speaking, two users cannot access the same data file without making a copy of that file. The Core Data foundation on which iBank relies for data management does not play well with network access - so if you place your iBank data file in a shared folder (even if both users are on the same computer), iBank will not be able to write changes to the file. You can use a shared folder to keep a central copy of the file, which users can copy to their Desktop before making changes in iBank and then replacing the file afterwards.

One exception to this rule allows shared access to a data file via .Mac. To share your data using a .Mac account, save the data file to your iDisk, then enable iDisk syncing on all computers you want to be able to access it (you will find this option in System Preferences under the .Mac pane). You do not need to have the .Mac backup feature enabled in iBank. Be sure to perform a synchronization just before opening the file on any given computer, to ensure that the latest changes are available.