While all of this is informative to any and all users, it’s really intended for advanced users who encounter package files from dubious sources or that are otherwise questionable. The final tab shows the scripts that will be run, “post install” which are often cleanup bash scripts that adjust permissions or perform a cleanup duty: The “All Files” view shows you exactly what files are going to arrive from the package file and where they are going to go, including permissions for specific files: The first is “Package Info” which shows an overview including how many items will be installed, the size of the installation, the developer ID and if it is signed (if applicable) and valid or expired, how many installation scripts are run, and where and when it was downloaded: Within Suspicious Package, you’ll see three primary tabs which detail all sorts of information about the package file. Once Suspicious Package is installed, you can give it a try by dragging any PKG installer file into the application, or selecting a package installer in the Finder and hitting Command+Spacebar to activate Quick Look on the package in question.

Get Suspicious Package free from the developer (for macOS and Mac OS X).

If any of this sounds interesting to you, you’ll want to download and install the application, which includes a Quick Look plugin: pkg files on a Mac is not particularly complicated though it’s obviously most appropriate for advanced users who will have a general idea of what they’re looking at and what to make of it.

Using Suspicious Package to open and inspect.

This is where the amusingly named ‘Suspicious Package’ application comes in to play, it’s a free Mac app which allows the opening and inspection of PKG installer files before the installation is actually executed, giving you a look at what is going to happen when the PKG is run.

How to view files on mac bootcamp