Have you tried the following steps?
https://support.apple.com/en-us/HT204098
If Safari on your Mac isn't working as you expect, one of these solutions might help.
These solutions are appropriate for issues that affect Safari on Mac, including issues such as the following. Before you get started, make sure that your Mac is connected to the internet.
- A webpage is blank or doesn't show all of its content
- You can't to sign in to a webpage, despite using the correct sign-in information
- A webpage asks you to remove or reset cookies
- Safari slows down or stops responding
Reload the page
If a page doesn't open or finish loading, try to reload it: Choose View > Reload Page or press Command-R. If that doesn't work, press Command-Q to quit Safari, then reopen Safari and try again. If Safari doesn't quit, press Option-Command-Esc to force Safari to quit.
Install software updates
Install all available Apple software updates, which can include updates for Safari. If you installed any Safari extensions, update them as well.
Turn off Safari extensions
Even if your Safari extensions are up to date, temporarily turn them off to be sure they aren't affecting Safari in unexpected ways. Choose Safari > Preferences, then click Extensions. To turn off an extension, deselect its checkbox.
Test with a private window
A website can store cookies, caches, and other data on your Mac, and issues with that data can affect your use of the website. To prevent the website from using that data, view the website in a private window: Choose File > New Private Window.
If that works, use the following steps to remove the website's data from your Mac. The website can then create new data as needed. If it's a website that you sign in to, make sure that you know your sign-in information before continuing.
- Choose Safari > Preferences, then click Privacy.
- Click Manage Website Data.
- Select the affected website from the list shown.
- Click Remove.
- Click Done.
- Open the website again in a non-private browser window.
