One Electronic Key for BeerSmith 2 Desktop Home Brewing Software. This activation key can be used with the latest updates to BeerSmith 2 desktop software for Mac, PC, or Linux. Your key will be delivered to your email address associated with this order within a few minutes of ordering. One activation key is good for installation on two computers (laptop and desktop for instance). Registration key does not include the mobile version which is available as a separate purchase from the major mobile app stores.