Safari not opening after macOS Sequoia update

Re: Can’t load Safari : I updated my MacBook Air to macOS Sequoia a few days ago no suddenly Safari will not open.

Things to try:

Quit Safari.

Restart your Mac: Apple Menu > Restart. 

wait .. then log-back in,

re-open Safari and re-try.

(often restores order when something its not working as expected ..

re-establishes the connection amongst other things. )

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If hasn't helped:

If installed: Try turning off any unnecessary third-party (non-Apple) software, like add-blockers, virus-checkers or the like, even VPN (if not supplied by an employer) as they can cause interference. (May still run in the background even if turned off ... even better is to use un-installers from the app-developers to get rid of them and any associated files.)

More info: If your device has network connectivity issues, check for VPN and other third-party security software - Apple Support

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Any third-party apps you find necessary may need to be updated to remain compatible.

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If still not working:  Try browsing through Apple Support's article (link below) for tips:

what to do: If Safari doesn't work as expected on Mac - Apple Support

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If needed: More info. / support / contact options etc.

Safari Support website