Turn off Siri Suggestions for Spotlight on Mac
When you turn off Siri Suggestions, Spotlight searches only the contents of your Mac; it no longer searches the web. You can also turn off Location Services for Spotlight.
Turn off Siri Suggestions
On your Mac, choose Apple menu > System Preferences, click Spotlight, then click Search Results.
In the list, deselect the Siri Suggestions checkbox.
Spotlight searches only the contents of your Mac. Look up searches only the dictionaries enabled on your Mac.
Turn off Location Services for Siri Suggestions
On your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click Privacy.
If the lock at the bottom left is locked , click it to unlock the preference pane.
Click Location Services in the sidebar.
In the list on the right, click Details next to System Services, then deselect the Location-Based Suggestions checkbox.
When you turn off Location Services on your Mac, your precise location won’t be sent to Apple. To deliver relevant suggestions, Apple may use the IP address of your internet connection to approximate your location by matching it to a geographic region. See the Apple Support article Siri Suggestions, Search & Privacy.