By default, macOS Sequoia sends your Safari, Spotlight, and Siri searches to Apple. Here’s how to turn that setting off.
In macOS Sequoia Apple retrieves some of your search data for analysis to improve searches. This info can include (but is not limited to) Safari and Spotlight searches, and text and audio data sent to Siri for queries.
It may or may not also include contextual data Spotlight has gathered from storage volumes connected to your Mac.
Apple’s privacy statement says this data is not used to identify you, and it’s not tied to your personal information or your Apple Account. Still, some macOS users may not want this data sent to Apple.
Källa: How to stop macOS Sequoia sharing your Safari and Spotlight searches with Apple