Sorry if this question has already been asked, I haven't been able to find any answers anywhere. I haven't bought much from the Mac App Store, but so far everything I've bought I've paid for once and been able to install on both my Macs. What's the deal with Lion? I imagine it will only install on the Mac I buy it on? Or will I be able to install it on my MacBook after buying, downloading and installing on my iMac? Thanks, Tim.