Mac OS Snow Leopard Windows 7 theme is available in Basic, Normal & Glass Style and is compatible with 32 and 64 bit versions of Windows 7 OS. Since this is not an official Microsoft Windows 7theme (never expect one as well!), for using the theme in Windows 7, one needs to use the a universal theme patch to apply third-party Styles in Windows 7.
Make Windows 7 Look like Mac OS Leopard
Download Universal theme patch Download Mac OS Leopard Theme for Windows 7 Unzip & copy Snow Leopard to : c:\windows esources\themes Next go to Desktop –> Personalize & apply Snow Leopard. To move the maximize/minimize and Close Buttons to the Leftside like in Mac OS, use the portable app “leftsider”.
[via]Techyard