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macOS 27 has a secret popover menu for AI power users
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Macworld UK - News, Tips & Reviews from the Apple Experts
Rather than Control-click to bring up the Apple Intelligence options, a small translucent Siri icon will appear next to any selected text.
It’s unclear why Apple hasn’t enabled this feature for all users, but presumably it’s because the feature is buggy enough to remain in testing.
Or perhaps it’s an internal feature for Apple employees that isn’t meant for public use.
We’ll caution that it uses the dreaded sudo command, which gives you the temporary ability to access system-level permissions.
Then paste sudo defaults write /Library/Preferences/FeatureFlags/Domain/WritingTools LightweightUI_macOS -dict Enabled -bool true and reboot your Mac.