To delete the browser cache in Safari, there are two options
  1. Tthrough a keyboard shortcut
  2. Use the Developer menu

Keyboard shortcut

The fastest way to clear (epty) your cache is to use following keyboard shortcut: [CMD] + [ALT] + [E].

Clearing the cache through the developer menu

You can also enable a developer menu in Safari to enable several professional options. To display the developer menu:
  1. Select the first item "Safari" in the main menu and from the drop-down the item "Preferences..."
  2. A popup opens. Click on the tab "Advanced".
  3. Check the option "Show Develop menu in menu bar" at the bottom. Now you should see a new menu item in the main menu named "Develop".
  4. If you click on the menu item "Develop" you can select "Empty Caches" from the submenu items.
  5. Reload the website and view any updates to the previous version.

Website info