I really need help. I've spent hours today trying to get this plugin to install. I even tried deleting sketchup completely and downloaded it again. Using mac os x 10.5 with sketch up 8. I need the plugin "round corners" I never successfully gotten a plugin to work and tried every step over and over. Could someone with a mac post screen shots of every step need to download a plugin. I know that sounds dumb, but I've exhausted all other attempts.