There are 2 options which resemble Mac OS very closely, both designed from similar code

1. Marlin (runs as application, keeping Nautilus as default)


2. Pantheon Files (can easily replace Nautilus)

Update This is a duplicate question.

UPDATE 2
I tried both Marlin and Pantheon Files (from other Stack Exchange contribution, see below). It seems that Pantheon files makes it easier to switch over from Nautilus. I am using Ubuntu 12.04 LTS.

It is called Marlin File Browser

Installation of Marlin

Option 1: Marlin with Dropbox / Ubuntu One support

sudo add-apt-repository ppa:elementary-os/daily



sudo apt-get update



sudo apt-get install marlin marlin-plugin-dropbox marlin-plugin-ubuntuone

Option 2: what I have tested without dropbox/ubuntu one support

sudo add-apt-repository ppa:marlin-devs/marlin-daily



sudo apt-get update



sudo apt-get install marlin

According to the website, it is rather new and might have issue. Check out this article with some nice pictures showing how similar it is to Mac OS X file and folder color labeling.

Also, see this article for how to install it on Ubuntu 12.04 or 11.10 or on Linux Mint.

Installation of Pantheon File Browser:

sudo apt-add-repository ppa:elementary-os/daily

sudo apt-get update

sudo apt-get install pantheon-files

For Dropbox or Ubuntu One support, add the plugins:

sudo apt-get install pantheon-files-plugin-dropbox

sudo apt-get install pantheon-files-ubuntuone