Marco Bombich has released v3.3 of his flagship application, Carbon Copy Cloner, which is used to backup a users' files. The latest version supports Mac OS X Snow Leopard and preserves HFS+ filesystem compression data during backups. The backup process is enhanced to better save a large number of files with extended attributes and features a "bootability" notification that informs users when a target volume's disk is not partitioned with the Apple-recommended GUID or APM partition scheme.