Why Can't I See The Safari Address Bar?
In Safari for Mac, there are a couple possible fixes for this issue. First, your address bar may have been removed from the toolbar so go to View > Customize Toolbar. From there, you can restore the default toolbar set or drag individual elements (like the address bar) into the toolbar.
Your Safari Address Bar might be missing because you are using Safari in Full Screen mode. If your Safari window is taking up the entire screen, move your cursor to the very top of the screen so that the menu bar appears. Then click on View and make sure Always Show Toolbar in Full Screen is checked.