Elementary OS is a great distro in the Ubuntu family of linux distros that offers a mac like look and feel on the desktop. It features a completely new desktop environment called Pantheon that is built atop GTK libraries. The desktop itself looks very stylish but very user-friendly and intuitive at the same time. And it looks great on laptops.
For the time being I tried it on virtualbox where it works flawless, except that you need to install the virtualbox guest additions like every distro.