2. Locate the tabs at the top of the settings window and click on the "Privacy" tab, then click on the "Manage Website Data..." button.
1. First, click on your Safari window to make it the active window. Then, click "Safari" on the top left of the menu bar.
2. Locate the tabs at the top of the settings window and click on the "Privacy" tab, then click on the "Manage Website Data..." button.
3. In the new window, you will see a list of website cookies. Click the "Remove All" button below this list.
4. Click "Remove Now" to confirm removal of cookies.
5. In order to clear browser cache, return to the main Safari preferences by clicking on the Safari menu on the top left again, and choosing "Preferences".
Next, click on the "Advanced" tab and look for the checkbox for "Show Develop menu in menu bar" at the bottom of the settings. Click the checkbox.
6. With an active Safari window, there should now be a "Develop" menu at the top of the screen. Click on this, and then click on "Empty Caches". Your caches and cookies should now be cleared.
https://support.intego.com/hc/en-us/articles/115003863692-How-To-Reset-Your-Safari-Web-Browser