OWC 4GB PC5300 DDR2 667MHz SO-DIMM Memory RAM Upgrade Compatible with MacBook (Late 2007/Early 2008), MacBook Pro (Mid/Late 2007, Early 2008), & iMac (Late 2007) with Core 2 Duo CPU (OWC5300DDR2S4GB) at Amazon.com
Memory Upgrades for Apple iMac 2008 - Up to 6GB
Can I install 8GB of memory in iMac 20 in… - Apple Community