How to find Xcode 11.5 stuck on ‘Installing’ on macOS and where does App Store store its packages

Описание

Xcode 11.5 got stuck on ‘Installing’ on macOS. How to find macOS App Store packages .pkg and install them manually if the automated installation process is failed. After I found it, reboot the system to kill all installation processes and manually re-ran this package I finally installed it. Sometimes, it doesn't seem to proceed, but after a while it turned to "Validating packages' and then finally accomplished the installation procedure with Failed message and recommendation to check with Apple's website. At least, I can use the installer from https://developer.apple.com/download/release/ under Applications tab.