Renowned for the drastic security and the limitations imposed on operating systems iOS yes macOS, Apple they didn't really pay attention to the passwords of "Users & Groups” on Mac operating systems.
Up to macOS High Sierra, Owners Mac they could opt for one simple one-character password. Starting with macOS mojave, Apple requires that the password contain at least 4 characters.
From a security point of view, a stronger password is welcome. A strong password (strong password) may prevent unauthorized persons from accessing our account. In addition, the system password is required at key points, such as installing an application, changing security settings, and accessing Keychain (utility that stores passwords and accounts).