6gig of ram is the official max ram according to Apple. But folks have been successful installing 32gig. So if you want/need 32gig…go for it! As far as the internal hard drive…I don't think that you REALLY want to mess with that. Apple" /> Mac Forums - View Single Post - Max Upgrades in a 2.5 GHz (EMC No. 2428, Mid 2011) 21.5" iMac
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pigoo3

 
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Member Since: May 20, 2008
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Mac Specs: 13" MB 2.4ghz, 2gig ram, OS 10.7.5

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16gig of ram is the official max ram according to Apple. But folks have been successful installing 32gig. So if you want/need 32gig…go for it!

As far as the internal hard drive…I don't think that you REALLY want to mess with that. Apple has made it much more difficult to upgrade your own hard drive with the addition of an extra hard drive cable, which has to do with a temp. sensor on the hard drive. Without the proper HD which has an extra port to plug this temp. sensor into…you can run into issues with your iMac.

If you want to proceed with an HD upgrade…do some research first to identify your options.

- Nick

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