Pkg Viewer -

Check the to make sure it matches your game base if you are viewing an update or DLC.

Are you using this specifically for or for macOS application management? How to Backup your Installed PS4 App Pkg's to a USB on 9.00 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. Check the to make sure it matches your