So after a long search on the webs I've found some questions regarding this specific USB adapter on a Mac. It appears some people were using the driver of a D-Link and other guy made it work by using the drivers on the Tp-Link website.
The problem is that when downloading the latest driver from the website, it doesnt work! the Installer asks me if I want to install for all the users and then the "Install" button is unclickable.
Also trying the "Standard Install" returns the same result:
Hope anybody can help me.