This RAM is compatible for use in many iMac systems. DDR3 SO-DIMM packages are compatible with:

- iMac 21.5 inch models (2009 to 2011)

- iMac 27 inch models (2009 to 2015)

- iMac 21.5 inch models (2012 to 2015) Requires advanced disassembly

All iMac models from 2010 to 2011 will be compatible with this RAM. Newer iMac models are also compatible, please note that slimline 21.5 models do not have a RAM access door and installation requires the removal of the LCD assembly.

Please note that systems using Core 2 Duo processors or Intel i3 processors may not be able to address 8GB DIMMs. Systems using i5 or i7 processors generally are compatible. Check Intel's site for specifics

Installation guides for RAM are available at Apple's site or iFixit