Apple has responded to concerns about Final Cut Pro X, the rewritten version of Final Cut Pro that lacks several professional features found in Final Cut Pro 7. Most of the answers can be summed up as, "Not yet, but it will" concerning multi-camera editing, assigning audio tracks, support for some video formats (like RED), and export to XML, OMF, AAF, and EDLs. Apple also notes that plug-in developers need to update their wares to be 64-bit compatible before they will work within Final Cut, and that volume license purchasing will be available soon. 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.
Apple Answers Final Cut Pro X Questions