I'm helping my friend fix his MacBook pro a1278. I erased and reinstall the original os that it came with, which is osx lion (10.8.3). But installation took over 5 hours to install, and after installing, it is extremely slow. So slow to the point where you can't even watch a YouTube video. What seems to be the problem? I think it needs an SSD. But I want to know what you guys think before I order him one. His goal is to sell it.