- Force Quit Safari and restart the computer.
1. Click in the menu bar and choose “Force Quit”.
In the window that opens up, select “Safari” and click “Force Quit”.
2. Restart your computer.
3. Relaunch Safari holding the shift key down.
If the step posted above doesn't help:
2. Remove Adware if installed on your Mac
1. Use the latest release of Malwarebytes for Mac to remove malware/adware, if installed on your Mac.
For instructions: Install Malwarebytes for Mac Uninstall Malwarebytes for Mac
Click the “Scan Now” button. Once done, quit Malwarebytes for Mac.
Restart the computer and relaunch Safari holding the shift key down.
2. Additional steps to take if necessary
1. Remove unknown extensions: Safari > Preferences > Extensions
https://support.apple.com/guide/safari/use-safari-extensions-sfri32508/mac
2. Reset search engine: https://support.apple.com/guide/safari/customize-your-search-ibrwe75c2a3c/mac
3. Reset Homepage. https://support.apple.com/guide/safari/set-your-homepage-ibrw1020/mac
4. Restart your Mac. Relaunch Safari holding the Shift key down.