# Opening an archive or installer package in order to extract files from it manually

There are three ways to manually open a package with Pacifist:

1. If you want to reinstall files that are part of Mac OS X, use the
   button.
2. If you want to open an ordinary package or other type of archive file, use the Open Package button, or drag the file you’d like to open onto Pacifist. Pacifist supports the following formats:
   - .pkg
   - .mpkg
   - .xar
   - .zip
   - .tar
   - .tar.gz
   - .tar.bz2
   - .pax
   - .cpio
   - .cpio.gz
   - .cpio.bz2
3. Additionally, you can open many archive types directly over the World Wide Web. Click here for more information.