I am a newbie on the mac world and i'd like to know if it's possible to cut a file using a shortcut (like Ctrl + X on Windows).
It is possible to cut-paste files/folders in OSX 10.7 Lion's Finder (so, since 2011), but the OSX way is slightly different from the Windows way.
So, the steps are very similar to copy-paste, but holding ⌥ (option key) moves the file/folder instead of copies it.
You can also have a look in the edit menu after copying a file - press ⌥ while looking to see the difference: "paste" changes to "move item here".
I like XtraFinder
It's an enhanced version of Finder. You get Cut & Paste and a bunch of other features.
And it's free.