Apple introduced Platform Single Sign-On (Platform SSO) as the next-generation identity integration framework for macOS. Unlike traditional directory binding, Platform SSO allows local macOS accounts to be linked with cloud identity providers such as Microsoft Entra ID or Okta. When enabled, a user's macOS account credentials are kept in sync with their IdP credentials. This prevents password drift and ensures the same identity can be used across system login, apps, and web services. Apple Learning emphasizes that this provides a unified sign-on experience, replacing the need for legacy solutions like AD binding. Neither Entra ID nor LDAP alone synchronizes macOS local accounts; the synchronization requires the Platform SSO technology.