My wife has a Mac Pro she bought in 2009. I believe it has either a quad or dual quad processor and 20 gb of ram (I upraded the ram with 16 GB more a while back). When she got the computer it ran so much faster than her older G5. Now it seems slower. I'm a PC guy and no next to nothing about Macs. Her biggest issue is Photoshop CS4 keeps crashing. Where would I start the troubleshooting?