Apple today released MacBook, MacBook Pro Software Update 1.0 which enables file system journaling on MacBook and MacBook Pro notebook computers. Some MacBook and MacBook Pro systems were shipped with file system journaling turned off. Journaling is recommended on all Mac computers as a preventative measure against file corruption.
• Mac OS X 10.4.9 or later
• MacBook (Mid 2007)
• MacBook Pro (2.2/2.4 GHz)
MacBook, MacBook Pro Software Update 1.0 is available via Software Update and also as a standalone installer.
More info and download link (200KB) here.