Check the to make sure it matches your game base if you are viewing an update or DLC.
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. PKG Viewer
: Displays the unique Title ID (e.g., CUSA12345 ) to ensure a game and its update share the same ID and region. Check the to make sure it matches your
: Drag and drop your .pkg file into the application or use the File > Open menu. Review Information : Alternatively, the command-line tool pkgutil --expand file
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