Hello guys, I need help on my macbook. I used parallel in my air to install some oil model simulation software. And all of a sudden, there are loads of horizontal lines appearing on my screen and left my macbook unresponsive. The horizontal lines sometimes are grey, black or white and it appear in columns in the screen. Any idea what does it means? After force shutdown, my macbook beeps 3 times loudly and then pause for 5 to 6 seconds, and beeps 3 times again. This continues until the battery is drained and annoying for the night. When fully recharged, it keeps beeping the same cycle. Please help. Some important work document is in there while the installation was going on.