How to Use Passkeys in Safari and macOS for Passwordless Logins

Traditional passwords remain one of the most vulnerable aspects of personal and enterprise digital security. Weak passphrases, credential stuffing, and phishing attacks routinely compromise online accounts despite complex rotation requirements and SMS verification codes. To solve these fundamental weaknesses, Apple, Google, Microsoft, and the FIDO Alliance introduced passkeys. Built on standard public-key cryptography, passkeys in Safari and macOS replace conventional passwords with cryptographic key pairs tied to your biometric identity. Passkeys eliminate phishing vulnerabilities entirely, synchronise seamlessly across your Apple hardware via end-to-end encrypted iCloud Keychain, and allow quick sign-ins using Touch ID.

How Passkeys Work in macOS and Safari

Passkeys rely on the WebAuthn standard and asymmetric cryptography rather than stored text strings:

• Public and Private Key Architecture: When you generate a passkey on a website, macOS creates a unique cryptographic key pair. The public key is stored on the service’s web server, whilst the private key remains locked securely inside your Mac’s Secure Enclave.
• Phishing Resistance: Passkeys are cryptographically bound to the website’s exact registered domain name (such as github.com or google.com). If an attacker lures you to a lookalike phishing portal (like g00gle.com), Safari recognises the domain mismatch and refuses to provide the private key.
• End-to-End Encrypted iCloud Synchronisation: Your passkeys sync seamlessly across your Mac, iPhone, and iPad through iCloud Keychain. Apple cannot read your passkeys, and they remain accessible even if you replace or lose a single device.
• Biometric Authorisation: Signing in requires verifying your presence using Touch ID, Apple Watch confirmation, or your local macOS user account password.

Step-by-Step: Creating a Passkey for an Online Account in Safari

To replace a password with a passkey on a supported service (such as Google, GitHub, Amazon, or PayPal):

1. Launch Safari on your Mac running macOS Ventura, Sonoma, Sequoia, or later.
2. Navigate to the supported website and sign in to your existing account.
3. Open your account settings and locate the Security, Authentication, or Sign-in Options section.
4. Click Create a Passkey or Add Passkey.
5. Safari displays a native macOS system prompt: “Do you want to save a passkey for [Account Name]?”
6. Rest your finger on the Touch ID sensor on your Mac keyboard (or enter your Mac login password if Touch ID is not configured).
7. macOS creates the cryptographic pair, registers the public key with the service, and stores the private key in your iCloud Keychain.

Signing In with a Passkey on Mac

Once registered, logging in becomes instant and friction-free:

1. Open the login page in Safari.
2. Click the username or sign-in field. Safari automatically displays your registered passkey in an AutoFill credential banner.
3. Select your passkey and verify your identity using Touch ID.
4. You are signed in immediately without typing passwords or entering two-factor authentication codes.

Managing and Auditing Stored Passkeys in macOS

You can review, edit, and organise all saved passkeys directly inside macOS System Settings:

1. Click the Apple menu () in the top-left corner of the screen and choose System Settings.
2. Scroll down the sidebar and select Passwords. Authenticate using Touch ID or your macOS account password.
3. Type a website name into the search bar or scroll through your stored credentials.
4. Accounts configured with passkeys display a distinct badge reading Passkey alongside the credential details.
5. Click the account entry to view the creation date, associated username, and domain binding. To delete a passkey, click Delete Passkey.

Signing In on Non-Apple Devices Using Your Mac Passkey

Because passkeys follow cross-platform FIDO standards, you can use your Mac or iPhone to sign in to accounts on Windows PCs, Linux workstations, or shared computers:

1. On the secondary non-Apple device, open a modern browser (such as Chrome, Edge, or Firefox) and select Sign in with a Passkey.
2. The browser displays a secure QR Code on the screen.
3. Open the Camera app on your iPhone (or use your Mac camera if prompted) to scan the QR code.
4. Your devices establish a short-range, peer-to-peer Bluetooth proximity handshake to verify that you are physically in front of the computer.
5. Confirm the login with Touch ID or Face ID; the non-Apple browser authenticates instantly without exposing your private key.

Passkeys vs Traditional Passwords and 2FA

Security Vector	Passkeys (Safari / macOS)	Traditional Passwords	SMS / App-Based 2FA
Phishing Vulnerability	Immune (cryptographically domain-bound)	High (easily harvested by fake portals)	Moderate to high (SIM-swapping, interception)
Credential Stuffing Risk	Zero (no shared secrets on servers)	High (reused passwords leaked in breaches)	Mitigated
Storage Security	Hardware Secure Enclave + iCloud Keychain	Browser caches or password vaults	Authenticator apps or carrier networks
Authentication Speed	Instant (single Touch ID tap)	Slow (typing + retrieving codes)	Slow (waiting for SMS or opening app)
Server Breach Impact	Zero (stolen public keys cannot decrypt logins)	Severe (hashes can be cracked offline)	Zero on primary login

Troubleshooting Passkey Issues in Safari

If passkeys fail to prompt or authenticate properly in macOS:

• Verify iCloud Keychain Status: Navigate to System Settings > [Your Apple Account] > iCloud > Passwords & Keychain and verify that synchronisation is toggled On.
• Check Safari Extensions: Certain third-party password manager extensions intercept WebAuthn dialogue windows. Temporarily disable conflicting extensions in Safari > Settings > Extensions to isolate the issue.
• Ensure Bluetooth Is Enabled: Cross-device passkey handshakes (such as signing in on a shared PC via an iPhone) require Bluetooth to verify physical proximity.

Frequently Asked Questions

What happens to my passkeys if I lose my Mac?

Because passkeys are synchronised through iCloud Keychain with end-to-end encryption, all your credentials remain secure in Apple’s cloud infrastructure. Signing in to a new Mac, iPhone, or iPad with your Apple Account and entering your recovery passcode immediately restores all your passkeys.

Can I share passkeys with family members or team colleagues?

Yes. macOS supports AirDrop passkey sharing to nearby Apple devices, as well as shared password and passkey groups inside System Settings > Passwords > Family Passwords.

Can passkeys be used if a website does not yet support them?

No. Passkey authentication requires server-side support for the WebAuthn protocol. Websites that have not yet implemented passkeys will continue to require traditional passwords and multi-factor authentication.