
Use the macOS installer logs to see what happened during installation.
macOS installer files are called Packages and usually have a file extension of .pkg. When you open a .pkg to install software on your Mac, Apple’s installer app performs a complex series of steps to verify and install the software.
Most .pkg files are built to contain a series of standard steps in which the package is first verified, then payloads are decompressed and copied to the target drive.