Hi, I have a 2009 mac book pro. It keeps freezing a lot with a fresh Yosemite install. It seems like the motherboard is going bad as well. I just updated it 8 gigs of ram and a SSD hard drive and also I see the battery is going bad. I don't have much money to get a new one I would like to get it fixed or either trade it in and maybe apply that money to a older mac pro. I just don't want to sit and lose the money for the machine all together. help ?