Most Apple deployments skip Platform SSO entirely. Done right, it means users log in once and everything works — MDM, SaaS, local account, all unified.

What this covers

• Entra ID via the Apple Enterprise SSO extension, and Okta Device Trust with FastPass
• XCreds for other IdPs — Google Workspace, Ping, and others — replacing the macOS login window with an OAuth/OIDC flow, so you’re not waiting for Apple to certify your provider
• Certificate-based auth over password sync where possible
• Troubleshooting the edge cases Apple’s docs don’t mention
• Silent rollout that doesn’t break existing user sessions

Why it’s hard

Platform SSO touches identity, MDM, and the OS simultaneously. Getting any one of them wrong breaks the others. I’ve debugged most failure modes already.