I would like the nautilus windows look like a mac :
When you click on a folder (in the part 1 of screen), the content of this folder was display (in part 2 of screen)
It's very useful when you have many files.
It's possible to have this functionality in Ubuntu?
There is a marlin fork:
Related:
Update 3: The instructions below are outdated, and Marlin may no longer be maintained? Thank you @kipbits for bringing this to my attention!
Update: So for gnome 3.
Perhaps Marlin
What you are looking for is a Columns View capable window/file manager as seen (here). Nautilus is still discussing whether to include Miller Columns.
For gnome2/nautilus themes:
Install and configure a new theme. (like this) Download (mac4lin)