Apple has released MacBook Pro EFI Firmware Update 2.8, which specifically targets 15-inch models released in late 2008. This update resolves a graphics issue that may cause the internal display to flicker. To ensure you get the firmware update only if it’s necessary, we recommend relying on Software Update; if the update doesn’t appear for you, it’s not appropriate for your Mac. (Free, 1.8 MB)
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.
Firmware Update for MacBook Pro (15-inch, Late 2008 Models)
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