Macbook Pro has become slow
I had OS X Snow Leopard as the default installed OS X when I bought my Macbook Pro(15 Inch) in the fall of 2010. Since then I have been upgrading/updating the software as and when the App Store prompted me that the software update is available. I was very happy with the speed & overall working of my Macbook Pro. However since OS X Mavericks came, things started slowing down & now since I have upgraded to OS X Yosemite, now version being 10.10.2, speed is a thing of the past & my Mac is not just slow, but most apps hang midway. The processor is 2.4 GHz & Memory is 4GB 1067 MHz DDR3. Can anyone out there suggest if there is a way to make my Macbook as fast as before if not more? Also, if there is a way to :
a) instal a faster RAM & a bigger HD incase either of these or both are problem?
b) If reverting back to OS X Snow Leopard is possible? (I am aware this could be a remote possibility but still hoping).
I am based in India & no one here has a clue to trouble shoot Apple products let alone service them well. Any help from my American/European friends in the community will be much appreciated. Thanks a ton !!
Regards,
N.Vishwanath
MacBook Pro (15-inch Mid 2010), Mac OS X (10.6.8), null