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The 2009 Mac Minis Support 8GB of RAM
Friday, October 23, 2009 - 8:38 PM EST
Posted by: Brian

Well, it's unofficially official! A 2009 Mac mini running Snow Leopard with the latest firmware installed supports 8GB of RAM. This would be with the EFI Boot ROM version MM31.0081.B06 (EFI 1.2), which was released back in August. We actually had our friends over at OWC test a Mac mini with 8GB of RAM at that time, but it turns out the test machine was running Leopard. Therefore, the memory wasn't being utilized properly. Here's a part of the message we received from Larry O'Connor today clearing things up.

We have to go back and test again under 10.5.x - see if something else has changed... But, when we tested when you last requested - we had 10.5.x installed with latest firmware and all the latest updates to that point and more than 4GB definitely did not work correctly. Saw the memory, but experienced significant slow down as soon as more than 4.0GB was in physical use.

We just tested the two old models from March 2.0GHz and 2.26GHZ + the current October shipping 2.26GHz and 2.53GHz models - all with the latest 10.6.x Snow Leopard... And they ALL work 100% with 8GB. FULL utilization, no slow down - performance gained for applications open that can result in more than 4.0GB utilized.

So there you have it folks! I hope that clears up some of the confusion going around. It should also be noted that our friends over at OWC are now offering and supporting 8GB memory kits for the 2009 Mac minis.

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