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Mid 2010 Model A1278 / 2.4 or 2.66 GHz Core 2 Duo processor

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How much RAM can I install?

I have 2GB of RAM in my laptop. Before I open it up I would like to know what the maximum RAM is that I can install in my MacBook Pro?

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There's no way to tell you until we know EXACTLY which machine you have. Please give the last three letters of your serial number.

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Wow! Thank you everyone for your responses and interests. I feel a little silly that I am unsure of my unit. I purchased it in November of 2009 so I assumed it was likely the 2010 release(as they do with cars) so maybe it was the 2009? Sorry to sound like a doehead. When I click on my "about this mac" it is clearly 2GB 1067 MHz DDR3. It is the model A1278

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....and my serial number ends in 266D

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Apple MacBook Pro "Core 2 Duo" 2.26 13" (SD/FW) Specs

Identifiers: Mid-2009 13" - MB990LL/A - MacBookPro5,5 - A1278 - 2326*

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This says your post is listed under the Mid 2010 model Pro. The Apple site says this model should have come with 4GB installed (2 x 2GB) and is upgradeable to 8GB. However, since you only have 2 in yours, I assume this is not the correct model year.

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+ excellent observation and the reason I asked before giving an answer. You're the type of person that would do well helping others with answers!

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You have a mid 2009. It will upgrade to 8MB.

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You can install 8 GB as stated here.

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That's a fine answer IF --- why does he only have 2 GBs ---- what's your hurry to answer here?

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It does say 2GB as standard for the Mid 2010 Pro in the link, which is the ifixit.com page for this model. I double checked Apple's site, and it doesn't offer a 2GB option for this model anywhere. I edited the ifixit description and removed the 2GB reference.

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daniel - well done

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Apparently I'm wrong, because it was rejected.

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I guess iFixit just doesn't want to admit the fact that THEY ARE WRONG, Even everymac has it correct: http://www.everymac.com/systems/apple/ma...

None of the 2010 MBPs come with less than 4 GB of RAM

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