I have a mid 2009, Intel Core 2 Duo 13 inch macbook pro. When I was playing team fortress 2 on my macbook, this happened (see attached picture.) Afterwards, I started my macbook up immediately after turning it off (bad idea in retrospect) which caused it to make a series of loud beeps with a plain black screen, so i turned it off again. I waited an hour and started my macbook up again and used it for about 5 minutes. I clicked team fortress 2 and it started loading for around a minute, until it freezed into this screen again. Does anyone know what it means/can solve my problem?