I recently bought 8GB of RAM to replace the 4GB of RAM for my mac, and it is having some issues. Here is exactly what I bought. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=400125979062&ssPageName=STRK:MEWNX:IT This should work in my mac, but when I boot, my mac tells me to shut my computer down and restart, and I am only able to boot half the time. I also have a Windows partition, and I am able to boot into that, but the screen scrambles, or it seems like parts of it in horizontal lines go all over the screen. When I am able to boot, the mac does see all 8GB of RAM and says the status is ok. I've tried rebooting, the PRAM reset, and cmd+v boot. any help would be appreciated.