I've got a MacBook 2010 white unibody , with 4GB RAM but the bootup time and shut down times can be extremely slow . I'm running Mountain Lion. Every time I turn it on I even get the spinning wheel sometime ! I timed it took about 45 secs to shut down. Starting applications can be quite slow as well . Anyone able to help ? I've cleaned out all the trash files and do not think reinstalling will help. As well as running disk checks.