Hi! Lets see, I have a Mac OS X 10.6.8 with snow leopard OS currently. I have a situation with my roomie. We are sharing this computer and have two login accounts. lets use these examples, his is named red and mine is named blue. If I download the new OS, lion, onto blue, would red get the new OS aswell or not? Because in our current situation, he is not able to update to quicken essentials and old quicken does not work on lion. And i need/want lion for the efficiency and how cool it is 
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So my question is, can you download lion onto one computer but have it only effect one login. Thanks in advance!
.So my question is, can you download lion onto one computer but have it only effect one login. Thanks in advance!