Need to get a high-resolution version of an app icon or just want to check out an app's various assets? iDownloadBlog points out that you can easily check out all those images by just dragging and dropping an app to the Preview app.
All you need to do is drag any app into Preview and you'll see all the assets right away. It's not exactly something you'll need to do very often, but it's pretty handy if you want to take a closer look at an app's various assets.
How to extract images from apps with the Preview app on Mac [iDownloadBlog]