I've got a macbook from school that I have to give back at the end of the year to be re-imaged with Adobe CS5 because they have a package. Am I allowed to download CS6 and at the end of the year put it on a hard drive for the next year?
You can take the download files and burn to a DVD. THen install later. This is recommeded for any downloaded software in case accidents happen and you have to reinstall.
You can have 2 activated copies, but only use one at a time. If it is your own copy be sure to deactivate and uninstall before returning computer, otherwise it is considered in use by you.