OS X Lion: Unable to install QuickTime MPEG2 Playback Component
When trying to install the QuickTime MPEG2 Playback Component in OS X Lion, an alert appears stating the software can't be installed on this disk.
In OS X Lion, QuickTime Player plays back MPEG-2 media without additional software. You can play most non-encrypted MPEG-2 file formats containing MPEG layer I or II audio, including .mpg, .mpeg, .m2v, .m2a, and .m2s files.
The QuickTime MPEG-2 Playback Component cannot be installed in OS X Lion because it is no longer required.
Note: If the QuickTime MPEG-2 Component is already installed on a Mac that upgrades to Lion, or is migrated to Lion via Migration Assistant, it will remain available for use by older QuickTime 7-based applications.