Open Safari
Click Safari in the menu bar
Select Settings
Go to the Privacy tab
Click Manage Website Data
Click Remove All
Confirm by clicking Remove Now
Close the Settings window
Quit and reopen Safari
Open Safari
Click History in the menu bar
Select Clear History
Choose the time range
Click Clear History
Open Finder
Click Go in the menu bar
Select Go to Folder
Enter `~/Library/Caches/`
Delete Safari-related cache files
Empty the Trash
Open Finder
Click Go in the menu bar
Select Go to Folder
Enter `~/Library/Safari/`
Delete Safari cache-related files
Empty the Trash