To run Tasty Recipes, your website must be running on PHP 5.3+. If you are unsure of your PHP version, ask your host. Most popular hosting companies will be using an acceptable version of PHP for WordPress sites.
Tasty Recipes works with all modern browsers. If you use Safari, you must be using Safari 10+. Safari is updated with your Mac OS - to learn how to update, click here: https://support.apple.com/en-us/HT204416