Over at Macworld, Andy Ihnatko ponders whether Lion’s sandboxing feature might mean that one of Apple’s best babies — interapplication communication — is being thrown out with the bathwater. Notice also the link to a Jason Snell article in a parallel vein. This is something that some of us here at TidBITS have been quietly worrying about for months. follow link
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.
Macworld Muses About Lion’s Sandboxed Future