I've been trying to find a solution here, but I don't know why my Mac Pro (2010 8 core, 6 RAM, ATI Radeon HD 5770 1024 MB) is this slow even when I use the pen tool when applying a stroke to a text. Why could this be? Some setting that I have to change? It's kind of intermitent. Some times it works well (if I reboot) .But I can't work like this. Sometimes I have to wait even to click on File.