Editing FileVault (section)

===Migration===
Migration of FileVault home directories is subject to two limitations:<ref>{{cite web | url=https://support.apple.com/kb/HT1554 | title=Archived - Mac OS X 10.3, 10.4: Transferring data with Setup Assistant / Migration Assistant FAQ | publisher=Apple | work=Apple support | access-date=January 21, 2013}}</ref>
* there must be no prior migration to the target computer
* the target must have no existing user accounts.
If Migration Assistant has already been used or if there are user accounts on the target:
* before migration, FileVault must be disabled at the source.

If transferring FileVault data from a previous Mac that uses 10.4 using the built-in utility to move data to a new machine, the data continues to be stored in the old sparse image format, and the user must turn FileVault off and then on again to re-encrypt in the new sparse bundle format.