I can't seem to find a definite answer. Here's my problem: I have SnowLeopard, but am unable to find my original disc that came with my macbook when I purchased it. I figured instead of paying however much to have the disc replaced, I would just upgrade to Lion. However, can you only purchase Lion through the app store? I was hoping I could purchase it from the Apple store on a disc so that it would replace my SnowLeopard disc that I have misplaced. Any help or suggestions would be great! Thank you!