Developer Panic has decided to not sell version 2.5 of its Apple Design Award-winning Coda Web development app in the Mac App Store, citing the difficulty of working with Apple’s sandboxing requirements. Apple began requiring apps submitted to, or updated on, the Mac App Store to be sandboxed as of 1 June 2012, forcing many developers to pull their apps from the store, stop updating them, or remove features to comply with the requirements. follow link
Turn Off Filename Extension Warning
In Leopard, Apple fixed an annoying aspect of working with the Finder in Tiger. Previously, if you changed a file's extension, the Finder prompted for confirmation. But since no one has ever accidentally changed a filename extension, Apple thankfully added an option to turn that warning off in the Leopard Finder's preferences. Choose Finder > Preferences, and in the Advanced screen, deselect Show Warning Before Changing an Extension.
Sandboxing Requirement Chases Coda off the Mac App Store