You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Posey Rose Author

Level 1

4 points

Safari will not open - error notice 303

What can I do to open Safari when I have error message 303

MacBook Pro 15″, macOS 10.15

Posted on Apr 19, 2021 6:37 PM

Reply

Top-ranking reply

Level 10

83,952 points

Posted on Apr 20, 2021 3:13 AM

Clear all website data

https://support.apple.com/guide/safari/manage-cookies-and-website-data-sfri11471/mac

Enable Develop menu, click Develop in the menu bar and then Empty Caches from the dropdown twice.

https://support.apple.com/guide/safari/use-the-developer-tools-in-the-develop-menu-sfri20948/mac

Related: If Safari doesn't open a webpage or isn’t working as expected

https://support.apple.com/en-us/HT204098

View in context

Similar questions

1 reply

Top-ranking reply

Level 10

83,952 points

Apr 20, 2021 3:13 AM in response to Posey Rose

Clear all website data

https://support.apple.com/guide/safari/manage-cookies-and-website-data-sfri11471/mac

Enable Develop menu, click Develop in the menu bar and then Empty Caches from the dropdown twice.

https://support.apple.com/guide/safari/use-the-developer-tools-in-the-develop-menu-sfri20948/mac

Related: If Safari doesn't open a webpage or isn’t working as expected

https://support.apple.com/en-us/HT204098

Reply

Safari will not open - error notice 303

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up