Apple's Secret Siri Interface Buried in macOS 27 Beta: How to Enable

Apple appears to be testing a hidden popover interface for Siri AI in the macOS 27 Golden Gate beta that surfaces Writing Tools and contextual actions whenever the user selects some text. Spotted by a member of Reddit's r/MacOSBeta community, the floating icon appears at the top-left of the selected text, expanding when the pointer hovers over it to a compact popover of Writing Tools and contextual actions. Currently, the popover offers the tools Rewrite, Proofread, "How does this sound?" and "Edit with Siri," plus options for creating key points and summarizing text. The contextual actions are based on the content selected, including things like adding contact details, composing a message or email, creating a calendar event, showing a location in Maps, and tracking flights or packages. The Siri popover is disabled by default in macOS 27 developer beta 3 and public beta 1. 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. Adventurous beta users can try it with the following Terminal command, followed by a restart:sudo mkdir -p /Library/Preferences/FeatureFlags/Domain && sudo defaults write /Library/Preferences/FeatureFlags/Domain/WritingTools LightweightUI_macOS -dict Enabled -bool true And to disable the interface, use this command followed by a restart:sudo defaults write /Library/Preferences/FeatureFlags/Domain/WritingTools LightweightUI_macOS -dict Enabled -bool false Note that the UI's behavior is inconsistent, and there's no guarantee the interface will make it to the final release of macOS 27 Golden Gate this fall. Popular StoriesApple Seemingly Killed Siri AI Waitlist Workaround in macOS 27 Beta 2Wednesday June 24, 2026 5:00 am PDT by Tim HardwickApple appears to have closed the loophole that let Mac users skip the Siri AI waitlist in the latest macOS 27 Golden Gate beta. As we covered earlier this month, beta 1 testers can switch on the enhanced version of Siri straight away using a single Terminal command, effectively sidestepping Apple's waitlist. However, many users who are running the second developer beta of macOS 27, which...Tim Cook Holds 'Constructive' Talks With EU Over Siri AI LaunchWednesday July 1, 2026 4:49 am PDT by Tim HardwickApple CEO Tim Cook held "constructive" talks with EU tech chief Henna Virkkunen on Tuesday about releasing Siri AI in the bloc while complying with the bloc's digital rules, reports the Financial Times ($). An EU spokesperson told the publication the virtual meeting had involved a "constructive exchange on topics of common interest, on which the work continues." Siri AI will be available...Siri AI Comes to Apple Watch in watchOS 27 Beta 3Monday July 6, 2026 1:24 pm PDT by Juli CloverWith watchOS 27 beta 3, Apple added support for Siri AI and the Siri app, so Apple Watch users can now use the features right from their wrist. Apple said Siri AI would be coming to the watch back when watchOS 27 was first introduced, but the feature wasn't live until now. The Dynamic App Grid that pops up when the Digital Crown is pressed displays the Siri app in the center, and the...