iMac 2009 Memory Upgrades

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Memory upgrades for 2009 iMacs: the Early and Mid 2009 models (iMac9,1) and the Late 2009 21.5-inch and 27-inch models (iMac10,1 and iMac11,1).

Memory for the 2009 iMac

Type: DDR3 1066MHz PC3-8500 non-ECC SODIMM (204-pin).
Slots: two on iMac9,1; four on the Late 2009 21.5-inch and 27-inch models.
Options: single 4GB and 8GB modules, matched pairs of 8GB (2x4GB) and 16GB (2x8GB), and, for the four-slot Late 2009 models, sets of four: 16GB (4x4GB) and 32GB (4x8GB).

Listings for this Mac: DDR3 1066MHz PC3-8500 SODIMM for iMac 2009, sets of four and DDR3 1066MHz PC3-8500 SODIMM, single modules and pairs.

Before you order

To confirm which Mac you have, open the Apple menu, choose About This Mac, then System Report, and read the Model Identifier line. Match it to the identifier shown on this page before you order. The 2009 identifiers are iMac9,1, iMac10,1 and iMac11,1.

Single modules and pairs are on a listing shared with the MacBook Pro of the same years, which takes the same module, so that listing carries the MacBook Pro name. The module specification is identical.

Maximum memory differs between the 2009 models. If you are not sure your iMac supports 8GB modules, send us the model identifier first.

Studios, labs and fleets

NEMIX RAM is a US-based memory specialist, in business since 1993. Every module is researched, matched, and compatibility-tested by NEMIX RAM, is JEDEC-compliant, and is backed by a lifetime warranty. Purchase orders and volume pricing are available for studios, labs, schools and IT departments that keep a fleet of Macs in service. Request a quote, or send us your model identifier and we will confirm the right module before you order.

More Apple memory: iMac memory guide · MacBook Pro memory guide · Mac mini memory guide · Mac Pro memory guide · all Apple memory upgrades