7. When Apple Releases a New Version of Mac OS X
Every 18 months or so, Apple rolls out a new, major update to Mac OS X. In anticipation a major update, I'd like to share some advice you should follow whenever Apple releases a major new version of Mac OS X.
Even more important than the major upgrades is keeping current with minor updates to Mac OS X, because these are likely to fix serious bugs and security holes. For more information, read Install the Latest Version of Mac OS X (page 11) and Use Software Update to Install Apple Software Updates (page 42).