Hi, I am having several problems with my 1st gen Intel iMac 24". The first I started to notice was that last year, it seemed to become slower and slower. Then when 10.5 came out, I reformatted and did a clean install. But still the machine felt sluggish to me. Not instantly giving me the content of a window when double clicking, but taking a few seconds before showing. Also when performing multiple tasks quickly after one another it seems to wait for a previous one to finish before it starts with the next one (maybe I am too fast, but it is highly annoying when you are trying to move an icon, and have to wait 5 seconds to then see it jumping around the screen). Another thing that lately appeared are horizontal lines on my screen, that can be captured in a screenshot: http://www.hofhuis.org/meuk/scherm.png As you can see it does not go all the way over the screen, and I can place things over it. So that part seems like a system bug to me (?). But about the sluggish speed.. anyone any idea? I ran Drive Genius over it and no errors came up... will it help to put in a Raptor? Oh, I have 2Gb of memory in it.