7 · You need to update all the software using the above LEOPARD REBIRTH website which will give you all options to change the themes look from Tiger to Sierra theme. There are others but I am wary of using them. Even so, I had to use some third party utilities to get the right look. And I deleted most of the Tiger SERVER 'Server' software as it just takes up disk space. But only do that when you know what it does and have no need of it as a SERVER. I never used any of it, but just beware that old Tiger email and Web Browser (Safari) will not work either. TenFourFox browser does work if you get the very last INTEL version. Plus you will soon find that LOTS of your old PPC software will also work, although you may have to re-install them again. Like FreeHand MX. I discovered all my FONTS software (Extensis Suitcase Fusion) worked fine as did all my font sets.