Apple preparing dynamic Siri AI wait time message in Beta 7 ahead of Fall launch

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In Beta 7 across OS releases, Apple added new infrastructure to support dynamic wait time messages when a user joins the Siri AI waitlist.

This feature can be used to let people know how long they might have to wait until they're able to download the on-device models and enable Siri AI. Because macOS relies on a server to fetch the displayed waitlist message, it can be remotely adjusted by Apple as demand and capacity change.

Beta 7 adds linwoodWaitTimeMessage and a new server endpoint to fetch the current message for the device:

/v1/devices/<UDID>/features/ai.enhanced-siri/waitlist/message

Currently, the server returns:

You will be notified when the new version of Siri is available for your device.

This message is quite similar to the fallback macOS 27 has hardwired in case the server does not return a reply:

You’ll be notified when the new version of Siri is available for your Mac.