has anyone tested the new Mountain Lion on a 2008/2009 macbook?(aluminium) I've heard that with Lion some problems occured like mac becomes slow, battery life is halved etc. I'd like to know specific problems regarding updating from snow leopard to mountain lion on a 2008/2009 macbook pro with intel core 2 duo and 4GB ram, thanks!
I've installed Mountain Lion on a Macbook Pro 3,1 (2007). "Over the top", so no clean install.
Specs: 500 HDD, 2GB DDR2 RAM, 2.2 GHz C2D
This is the oldest MBP which supports Lion. And it runs fine. No hiccups so far. It boots as fast as before (~1 min). It sleeps reliably. But I can't comment on the battery life yet.
I also have have a 2009 MacBook Pro with 8GB of RAM. The upgrade to ML from SL seems to have boosted my battery life, although the battery indicator does seem to fluctuate more than before. Everything runs very smoothly, which was a pleasant surprise. Safari is exceptionally fast on ML. Dictation also works well around 85% of the time for myself.