Hi I have been searching for an answer for this question for a while now and I cannot seem to get an correct answer. In the mac app store how can I tell how many computers I can install an application on. For example I want to buy pixelmator. I have a macbook pro, imac and macbook air. Can I install it on all 3 or just one. Also how can I know this before I buy a program so I can put it on the computer I will would choose for it to be on?