The Ultimate Extensions Manager
For several years, Apple has offered a free program to manage the stuff in your System Folder—Extensions Manager. Based on a freeware utility, Extensions Manager can toggle on or off control panels, extensions, startup items, and items that are loose System Folder components. You can also create startup sets in case the items required to run one program influence the way another program works. The Mac OS–specific sets (Base and All) can isolate conflicts by restricting your startup programs to Apple's. You can even get basic information about what a strangely named extension does and then decide whether you need it.
Conflict Catcher.
This product from Casady & Greene (www.casadyg.com; $79.95) does a whole lot more ...
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