Do you know that all iOS applications that we downloaded from iTunes or from iPhone are stored locally on the Mac iTunes which can be access to those applications easily. This is the special part of the relationship between Mac and iOS devices.
How to find iOS app installed on Mac
To find the app, you need to launch “iTunes” -> “Library” -> click on “App” on the left menu. Now we will show all the apps downloaded from the App Store right-click on the icon of the app you want and select “Show in Finder “. It will automatically open the Finder on the Mac and the file will be shown. Ipa will be available to select.
Now you can manually backup your specific favorite app or copy the app in ipa to other Mac or PC.