Without looking into the installation script to verify, based on that description, it is only deleting an 'extended attribute' of the AeroSpace app. MacOS adds

Without looking into the installation script to verify, based on that description, it is only deleting an 'extended attribute' of the AeroSpace app. MacOS adds this attribute automatically to programs downloaded from the web, and prevents a user from running the program while it has the attribute. I frequently need to run a command like the following before running a downloaded program, which I'm guessing is exactly what the install script does: xattr -d com.apple.quarantine some-program.app