Open Safari
Click Safari in the menu bar
Select Settings
Click the Advanced tab
Enable Show features for web developers
Close Settings
Click Develop in the menu bar
Select Empty Caches
To clear browsing history, click History in the menu bar
Select Clear History
Choose a time range
Click Clear History
To remove cookies and website data, click Safari in the menu bar
Select Settings
Click the Privacy tab
Click Manage Website Data
Click Remove All
Click Remove Now