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Authored by: boredzo on Jan 11, '10 09:02:00AM

The danger here is that packages don't necessarily install everything anew—a package may replace a file that previously existed. If you remove everything the package installed, you won't restore anything it overwrote, so you'll have broken anything still needs the now-missing components.

In particular, do not use this hint to revert any Apple update.

This even goes for what may seem like just an application update. Many of Apple's applications are built on public and/or private frameworks: For example, many if not most Safari updates also update WebKit, which practically everything requires nowadays. Break WebKit, and any application that uses WebKit for anything—including ones you might not guess, such as Mail and iTunes—will stop working, either partially or completely.

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