I had bought this macbook pro (osx lion 10.8) off of craigslist. Macbook 2010, he replace the hard drive for a faster one (state slate or something like that), he gave me the original one. I am trying to install pro tools 10, but the macbook would not let me stall any software. It plays dvd's but would not read any software. Is the cd drive bad? Is their a setting I can change? PLZ HELP.