Apple OS base Windows 8 Visual Style, it is also works on Windows 8.1.
You can use it with any of this icon packs Windows 8 Icon Packs, especially Tango Windows Icon Pack.
The rar contains: “Snow Leopard”, “Snow Leopard Glass” & “Snow Leopard Basic” for Windows 8 (X86)32 bit & (X64)64 bit Systems.
if you wanna use Snow Leopard Glass, you should use Glass Aero For Windows 8 With WinaeroGlass App.
If you wish to get rid of the ribbon use the provided tool Ribbon Disabler for Windows 8.
Including This Pack :
Visual Styles/Themes (Normal, Glass & Basic) Start ORB Image. Wallpapers. Read Me.
Improvement’s 
Improve Start Menu. Perfect Titlebar height & Position. Perfect Aero Peek View. Basic Mood Added. Perfect Taskbar height ( Small & Big). Perfect Combine & Non-Combine Taskbar. Perfect Taskbar Button Position. Perfect Window shadow Like Mac. 
Glass Mood Added. Perfect Statusbar View Like Mac. Improve Favorite Link Color & Text. Improve & New Minimum,Maximum,Close Buttons Like Mac.