No got key by UbuntuSoftwareCenter

[primax]

USC version is serial free and includes Amnesia for Linux.
Desura is serial based and includes Windows, Mac and Linux as they support those platforms.

The version of game and what platforms you get depends on what platforms the store you bought from supports.

so I can not install the game I bought on my macbook? damn! But if it happens that the need to reinstall my os? I could not install more amnesia?