Can I update my old Macbook to OS X Lion?
Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
2GB of memory
OS X v10.6.6 or later (v10.6.8 recommended)
7GB of available space
Technically, it'll run on your computer, but I recommend holding off on upgrading and see what other people are experiencing with Lion on their machines.
You might want to follow this discussion to see what people's first impressions of Lion: gdgt.com/discuss/let-s-talk-about-os-x-lion-what-d...
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Something to consider, given liz's warning that "it won't perform very well" with less than 4 GB...and it looks like mcdoobie's 2 GB machine handles Lion okay.
As far as performance goes, their benchmarks didn't show a huge performance difference between Lion and Snow Leopard, so if you're happy with Snow Leopard I wouldn't worry much about Lion: lifehacker.com/5822435/lion-vs-snow-leopard-which-...
If I transition to lion will I still be able to enter <the new exposé, forgotten its name> with a keyboard shortcut?