Which SSO Solution Is Right for Your Apple Devices?
There are many ways to do single sign-on on Apple devices. Most admins can’t tell them apart.
That’s not a knock; the names overlap, the marketing blurs them together, and Apple keeps adding capabilities every release. But the distinction matters, because each option solves a different problem at a different moment, and picking the wrong one means a deployment that technically works and still frustrates everyone who logs in on a Monday morning.
This guide breaks down every option in plain language: what each one actually does, when authentication happens, which identity providers it supports, and when not to use it. By the end you’ll know which approach fits your fleet.
First, a quick reset on the vocabulary, because half the confusion is terminology.
SSO, SAML, SCIM, IdP: a plain-English guide
These four terms describe different layers of the same system.
An identity provider (IdP) is the central authority that stores and verifies your users — Microsoft Entra ID, Okta, Google Workspace, or JumpCloud. It’s the source of truth for who someone is.
Single sign-on (SSO) is the experience of authenticating once and getting access to many things without logging in again. It’s the outcome, not the protocol.
SAML (Security Assertion Markup Language) is one of the protocols that makes SSO work. When you authenticate, your IdP issues a signed SAML assertion that vouches for you to the app or service you’re trying to reach.
SCIM (System for Cross-Domain Identity Management) is the provisioning layer. It keeps user accounts and attributes in sync across systems — creating, updating, and deactivating users automatically as they join, change roles, or leave.
The short version: the IdP knows who you are, SAML carries that proof, SCIM keeps the accounts in sync, and SSO is the one-login experience all of it adds up to. Every option below sits on top of this foundation — they differ in where on the device the sign-in happens.
What does SSO actually do, and what does it solve?
The promise of SSO is simple: authenticate once against your identity provider instead of managing a separate password for every device, app, and service.
What that solves in practice is the daily friction tax: password fatigue, phishing risk, onboarding delays, and the steady stream of help-desk tickets that come from users juggling credentials across the fleet. On Apple devices specifically, the prize is bigger than convenience: done right, your Mac login itself becomes tied to your corporate identity, so there’s no separate local password to reset and no orphaned account when someone leaves.
Apple has been building toward this for years, and the industry has noticed. In early 2026, 9to5Mac called Platform SSO “the single most important technology Apple has introduced for the enterprise.”
What are your SSO options on Apple devices?
You have multiple options, each operating at a different point in the device lifecycle. For the sake of simplicity, we’ll review Apple’s native options against Addigy’s own Identity solution included in our Apple MDM.
What is Enrollment SSO? The front-door gate
What it is: An Addigy feature that requires IdP authentication during Automated Device Enrollment (ADE), so only authorized users can enroll a device into management.
When it appears: Once, at the Setup Assistant / enrollment stage of the ADE flow.
Why it matters: It closes the “anyone out of the box can enroll” gap. Only users assigned to the app in your IdP can complete enrollment.
Runs on: Mac, iPhone, and iPad (macOS, iOS, iPadOS).
IdPs supported: Okta, Google Workspace, Entra ID — any custom SAML IdP.
Don’t use this if: You expect it to log users in every day (it’s a one-time gate), or your devices aren’t going through ADE.
What is Extensible SSO? The underlying framework
What it is: Apple’s foundational framework that lets an IdP extension plug into the operating system and carry a single authentication across apps and Safari. It’s the plumbing that Platform SSO is built on.
When it appears: Invisibly, at the first app or web authentication (and at the login window, once Platform SSO is layered on top).
Why it matters: It eliminates repeated app and web prompts and can bridge legacy Kerberos / Active Directory alongside cloud auth.
Runs on: Mac, iPhone, and iPad (iOS 13 / iPadOS 13.1 / macOS 10.15+, with later OS versions required for advanced keys).
IdPs supported: Entra ID and others via Redirect; Kerberos / AD via Credential.
Don’t use this if: You need login-window sign-in, FileVault integration, password sync, or passwordless — those live in Platform SSO.
What is Platform SSO (PSSO)? The Apple-native login mode
What it is: Apple’s mode inside Extensible SSO that ties the macOS login itself to your IdP. One IdP identity drives the whole Mac and its apps — and it can replace legacy Active Directory binding.
When it appears: At Setup Assistant (on macOS 26) or via a registration prompt, then at every login window and first app launch.
Where it lives: The login window, FileVault, Lock Screen, native apps, and browsers.
Why it matters: One sign-in unlocks the computer and its apps, with optional passwordless authentication via the Secure Enclave.
Runs on: Mac only — not iPhone or iPad. macOS 13+, with newer releases (14 / 15 / 15.4 / 26) required for some features.
IdPs supported: Entra ID and Okta, via their native SSO extensions.
Don’t use this if: Your IdP is Google (no native Platform SSO extension), you need MFA enforced at the OS login window, or you run Intel Macs with Okta (Okta’s build is Apple-silicon-only).
What is Addigy Identity? The login-window layer
What it is: Addigy Identity is a macOS login-window replacement that signs the user in with their IdP account and syncs the local account password to your IdP. It creates the user’s local Mac account just-in-time on first login.
When it appears: At every Mac login: the login screen (after FileVault) becomes your IdP’s web login.
Why it matters: Just-in-time account creation, IdP password sync, MFA through your IdP, an emergency offline bypass, and zero-touch install, and critically, it supports Google, which native Platform SSO can’t.
Runs on: Mac only; the Mac login window.
IdPs supported: Microsoft Entra, Google, and Okta.
Don’t use this if: You rely on captive or public Wi-Fi at login, you need offline MFA, or you specifically want Touch ID at login (use Platform SSO for that).
Platform SSO vs. Extensible SSO: the distinction that trips everyone up
If there’s one pair people conflate, it’s these two, so it’s worth isolating.
Extensible SSO is the framework. Platform SSO is a mode that runs inside it. Apple introduced Extensible SSO back in 2019 as a way for identity providers to plug into the OS and carry one sign-in across apps and websites. It works across Mac, iPhone, and iPad, but it stops at the browser and app layer — it never touches the actual login window.
Platform SSO, introduced later, extends that framework down to the macOS login window itself. Instead of just smoothing app and web sign-ins, it ties your local Mac account to your cloud identity, keeps the passwords in sync (because FileVault uses the local password as its unlock key), and can make the Mac a trusted factor via the Secure Enclave.
The clean mental model: Extensible SSO is the bridge; Platform SSO is the destination. If you only need fewer prompts inside apps and Safari, Extensible SSO is enough. If you want the Mac login governed by your IdP, you need Platform SSO, or a login-window layer like Addigy Identity.
A framework for finding your fit
Two questions get you most of the way there.
Start with your setup: what do you manage? If you manage Macs, your candidates are Addigy Identity, Platform SSO, and Extensible SSO. If you manage iPhones and iPads, your candidates are Enrollment SSO and Extensible SSO (Platform SSO and Addigy Identity are Mac-only).
Start with the problem: what are you trying to solve? Login fatigue, password alignment, automating onboarding, access control, user-to-device mapping, or help-desk reduction. Both paths tend to land on the same recommendation.
The sharpest single question is this: when does authentication need to happen?
| When authentication happens | Best-fit options |
|---|---|
| During enrollment / setup | Enrollment SSO · Addigy Identity · Platform SSO (Mac) |
| At the Mac login window | Addigy Identity · Platform SSO |
| Inside apps & websites | Extensible SSO · Platform SSO (Mac) |
| After login, ongoing | Platform SSO · Extensible SSO |
Notice that most problems map to more than one option. That’s expected; identity rarely comes down to a single product. The goal isn’t to crown one winner; it’s to rank them for your situation.
Here’s an example: say you manage Macs and want to reduce login fatigue while giving people a better local-account and password experience.
Not the best fit on its own: Extensible SSO — it helps app and web sign-ins, but won’t solve the login window or password sync by itself.
Best fit: Platform SSO — it cuts login fatigue and improves the local account and password experience on the Mac.
Also consider: Addigy Identity — login-window workflows and onboarding you can deploy today, including Google support.
Where Addigy Identity fits
Addigy Identity is the login-window layer in this lineup, and a few recent changes are worth calling out, because they shape when it’s the right pick.
Apple management starts at hello. With Addigy Identity, users sign in at the Mac login with the same Okta or Entra credentials they already use – no separate Mac password to reset. Every sign-in auto-maps the device to the right user and keeps that assignment aligned with your IdP, with no manual upkeep (a capability that shipped this year as end-user directory assignment).
FileVault stays on, too. A new Silent FileVault unlock skips the duplicate pre-boot screen while keeping full encryption posture intact, so users authenticate once, at the login window — addressing a long-standing complaint that the FileVault screen looks identical to the normal login and confuses people. And because it’s a login-window layer rather than an Apple-native mode, Addigy Identity supports Google Workspace, which Platform SSO does not.
A note on cost: core Identity is included in every Addigy plan. The philosophy is that secure sign-in is the foundation, not a line item.
Looking ahead, simplified Platform SSO setup is coming to Addigy: a guided flow to stand up Apple’s Platform SSO without hand-building a configuration profile. The point of the lineup isn’t that one option beats the rest; it’s that the right answer depends on your devices, your IdP, and where you need authentication to happen.
Still not sure? Use our free Apple SSO finder tool
If you’d rather answer a few questions and get a ranked recommendation (including what each option does and doesn’t solve) Addigy built a free tool for exactly that: Find your identity & SSO solution. Start from the problem you’re solving or from the devices you manage; both paths lead to the same recommendation.
And if you want to see any of this running on a real Mac, request a demo and our team will walk you through it.
