Hi All: This is my first time ever posting to Mac forum, although I've had this computer for six years, although the motherboard was replaced four years ago through Apple Care for a weird speaker jack. Now I've updated to Yosemite, it loads a lot slower. Also, I can't make CD's but I can play and read them. A couple days ago, my laptop totally died and magically resurrected three days. Dead for at least two. I don't know if I got a surge in my outlet or what, but it died and did not come on no matter what I tried. Then it just starts up like nothing happened. Any ideas? How can I fix my cd so it will write? I also had strange problems with Java and I think I lost my old version of Photoshop, but no big deal.