On macOS, Harmony is provided in an Apple Disk Image (.dmg) file, which contains the software package. The installation procedure mostly consists of copying its content to the Applications directory.
Copying the package's files does not require administrator privileges. However, since the package cannot be verified by macOS, launching each of the applications inside it for the first time will require authorization by an administrator. After launching an application for the first time, it will be authorized permanently and regular users will be able to launch it. Since the Harmony package contains several applications, this process must be done once for each application to unlock them all.