I have a MacBook Aluminium late 2008 version: 2GHz Intel Core 2 Duo, 2 GB 1067MHz DD3.
Since Apple doens't provide updates for my mac anymore and other important apps (like Firefox) does the same, I'm willing to upgrade to Mountain Lion.
I'm not an expert and I'm wondering if upgrading my mac will slow down it or if there will be any other important warnings.