Is it advisable to upgrade an early 2009 MacBook (2GB RAM, 2.0GHz Intel Core 2 Duo) from 10.5.8 to Lion? Under 10.5.8, the user is complaining about some 'slowing down' (especially after a few days w/o restarting). If we upgrade, how strongly is it recommended to increase the RAM (to 4GB? to 6GB?).
I'd love to hear from people answering based on either the specs or first-hand experience. Thanks.