MacOS 27 Features a Hidden Menu Powered by Siri.
Siri AI is the most significant feature in Apple’s upcoming software update. Whether you’re using iOS 27, macOS 27, or even watchOS 27, the first thing you’ll likely notice ( assuming you have a compatible device ) is that Siri has become much smarter and more functional than in previous versions. Judging by the beta versions , this is truly the most comprehensive Siri update Apple has ever released.
But it seems the company isn’t limiting itself to the updates already announced. By continuing beta testing these new updates, and with them Siri AI itself, Apple appears to be experimenting with its new AI assistant, quietly introducing new features that beta testers will have to discover for themselves. One such feature? The new Siri AI menu that appears when you select text in macOS 27.
How Siri AI’s Hidden Menu Works in macOS 27
As MacRumors reports , this new menu appears when you select text in macOS 27. A floating menu appears in the upper-left corner of the selected text. Hovering over it expands the menu, revealing options like “Check Spelling,” “Rewrite,” “How Does It Sound?” and “Edit with Siri.” You can also ask Siri AI to highlight key points or summarize the text entirely. Depending on the text, other options may appear: if you highlight text from a friend, Siri AI might show you contact information; if the text contains a date, Siri AI might suggest creating a calendar entry. This aligns with Siri AI’s concept of contextual awareness, which is part of Apple’s mission to make its assistant more useful in specific scenarios.
The thing is, this menu is disabled by default, at least in the macOS 27 developer beta (version 3) and public beta (version 1). Apple also didn’t mention it in the release notes; instead, a Reddit user discovered it by chance and shared instructions on how to enable it on r/MacOSBeta.
How to enable Siri AI menu in macOS 27
Keep in mind that this feature, like macOS 27 as a whole, is in beta. MacRumors reports that the feature doesn’t always work, so you may encounter strange bugs or crashes after enabling it. However, if you’re already using the beta and are curious, it’s an interesting feature worth exploring.
To try it out, open the Terminal app on your Mac. Then paste and run the following command: sudo mkdir -p /Library/Preferences/FeatureFlags/Domain && sudo defaults write /Library/Preferences/FeatureFlags/Domain/WritingTools LightweightUI_macOS -dict Enabled -bool true
To activate this feature, you’ll need to restart your Mac. After rebooting, the menu will appear when you select text, although it may be intermittent. If the feature is unstable or you simply don’t like it, you can disable it by entering the following command in Terminal: sudo defaults write /Library/Preferences/FeatureFlags/Domain/WritingTools LightweightUI_macOS -dict Enabled -bool false