Pkg is an extension of Mac OS X Installer package. It can be opened by MAC OS X.
Pkf is zipped setup file that specially used MAC OS X operating systems. The installation can be started by double click. Or you have a chance to check those files by right click. Then you should pick the "Show Package Contents" option. After this action you will be able to see the files.
What to use pkg
Mac OS X
which page related to pkg file
pkg Related Searches
You can check related links about pkg fileextension.