Pkg Viewer -

If you are referring to standard Apple installer files, you do not need a special "viewer" app. You can use the built-in option in the macOS installer to see what will be installed before you run it. Alternatively, the command-line tool pkgutil --expand file.pkg output_folder can be used to unpack them.

: Views details such as firmware requirements, version numbers, and included DLC content. How to Use PS4 PKG Viewer Open the Tool : Launch the executable on your Windows PC. PKG Viewer

Verify the to see if it is a Patch, Game, or Add-on. If you are referring to standard Apple installer