Pacifist is a small program that opens up .pkg installer packages and lets you install individual files out of them.

This is useful if you need to install just one file out of a package instead of the entire package (for example, if you deleted Sherlock and need to reinstall it, but not the whole operating system), if you experience bugs in Installer.app that mess up your symbolic links, or if you just like a little more control over the installation process.

Pacifist can also examine the kernel extensions installed in your system to let you see what installer installed them, and whether the installer was made by Apple or a third-party.

Download : Pacifist v2.5.1