To delete the browser cache in Safari, there are two options
Tthrough a keyboard shortcut
Use the Developer menu
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:
Select the first item "Safari" in the main menu and from the drop-down the item "Preferences..."
A popup opens. Click on the tab "Advanced".
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".
If you click on the menu item "Develop" you can select "Empty Caches" from the submenu items.
Reload the website and view any updates to the previous version.
Why keeping your web browser up to date?
Many security threats that you can be subject to when you're browsing the web are phishing sites, viruses,identity theft, trojans, spyware, adware, and other sorts of malware. Many browser updates will deal with these issues. Whenever you have the latest version of any browser you know that you have the best browsing experience you can have. Display and loading speed of a page are at its best with an up-to-date browser.