Apple’s macOS 27 Beta includes a hidden Siri AI interface, offering AI tools via a pop-up menu when text is highlighted.
Hidden Siri AI Interface Details
A hidden lightweight UI
for Siri AI was uncovered in the macOS 27 Golden Gate beta, according to a Reddit user on the r/MacOSBeta subreddit. This interface appears as a floating icon at the top-left of selected text, expanding into a compact popover with tools like Rewrite, Proofread, How does this sound?
, and Edit with Siri.
Contextual actions, such as adding contact details or tracking flights, also appear based on the selected content, as reported by MacRumors.
The interface includes options for summarization, bullet-point creation, and calendar event setup. However, Apple has not officially launched the feature, with both sources noting it remains unfinished.
The feature was spotted in the macOS 27 Golden Gate developer beta 3 and public beta 1, according to MacRumors. It is disabled by default
in these versions, with Apple indicating it is not yet ready for general use. Beta testers found it can be switched on through a private feature flag, but the feature is clearly unfinished. Some of the actions don’t respond, suggesting Apple is still building out the underlying functionality, as noted by MacRumors.
When text is highlighted, the Siri AI pop-up provides tools such as rewriting, proofreading, and generating bullet points. Contextual actions vary based on the selected content. For example, highlighting a phone number triggers options like Add to contacts,
while an address offers Open in Maps.
Other actions include composing messages, creating calendar events, and tracking flights or packages, according to MacRumors.
For more on this story, see iOS 27 Unveils Standalone Siri App on iPhone, Mac, and Apple Watch.
Enabling the Secret Feature
Reddit users, including one identified as pdfu, shared terminal commands to activate the interface. The process involves creating a directory and using the defaults write command to toggle the LightweightUI_macOS
flag. After a restart, the Siri AI popover becomes visible. To disable it, a similar command resets the flag, as outlined by MacRumors.
Developer and User Reactions
What This Means for Apple’s AI Strategy
The hidden Siri AI interface signals Apple’s ambition to position Siri as an all-in-one AI tool
across its products. By embedding it in macOS, the company aims to streamline tasks like text editing and contextual actions, similar to competitors like Microsoft’s Copilot. However, the unfinished state of the feature highlights the challenges of integrating AI into legacy systems, as noted by MacRumors.
As macOS 27 nears its fall release, the hidden Siri AI interface will likely undergo further refinement.
Sources: Mashable.
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