I'm using Safari Technology Preview 109 on the MacOS 11 beta, on a 16" MacBook Pro. Unfortunately, I am unable to get the browser to ask for Touch ID. Instead, Safari will always ask for a security key: Do you want to allow “localhost” to start using a security key to sign in? Insert your security key and activate it to continue. I have the "Web Authentication" and "When Authentication Local Authenticator" experimental features enabled. The web server is running on localhost. I'm using the code as shown in wwdc20-10670, except I'm not using attestation. I've never had a security key connected to this Mac either. My code is this: const challengeBuffer = Uint8Array.from("XXXXXX", c => c.charCodeAt(0)) const options = { 	publicKey: { 		rp: { name: "localhost" }, 		user: { 			name: user.email, 			id: Uint8Array.from(String(user.id), c => c.charCodeAt(0)), 			displayName: user.displayName 		}, 		pubKeyCredParams: [{ type: "public-key", alg: -7 }], 		challenge: challengeBuffer, 		authenticatorSelection: { 			authenticatorAttachment: "platform" 		}, 	} } const publicKeyCredential = await navigator.credentials.create(options); What am I missing to get Safari to ask for Touch ID instead of a security key? If I'm reading the release notes for Preview 109 - https://webkit.org/blog/10875/release-notes-for-safari-technology-preview-109-with-safari-14-features/ correctly, Touch ID should be working: Web Authentication.* Added a Web Authentication platform authenticator using Touch ID, if that capability is present (macOS Big Sur-only). [...]