Go to the Apple menu, About my Mac, go tommemory.
It will tell you exactly what you have.
You'll either have ddr2 or ddr3.
You'll need that.
If ddr2 get 800mhz which is at least as much speed as a Mac is specced for.
If DDR3 get 1333mhz.
As for how much your computer can hold, there is google.
Anything from 2010 or newer can certainly go to 8gb.
I expect a 2009 machine can do that also.

At 06:46 AM 7/27/2011, you wrote:
HI all.

My wife has an old Macbook and we are planning to upgrade it to Lion. What memory does the Macbook use?

In fact, I might even upgrade my Macbook Pro laptop from 4gb to 8gb. I would have to find out the memory used to upgrade it. I am not even sure the maximum for both of these laptops.

Any assistance is welcomed.
On 27/07/2011, at 8:26 PM, Chris Moore wrote:


Sean
> I have just upgraded my Macbook Pro and iMac from 2gb to 4GB and yes it does make a difference. VM Fusion runs better too. I got my memory from www.crucial.com, bargain.
>
> On 27 Jul 2011, at 10:17, Dane Trethowan wrote:
>
>> Hi!
>>
>> Just curious, I have 2GB of memory in both iMac and Macbook. I notice that 2GB is the minimum memory requirement for OSX Lion so I'm wondering is it worth the bother upgrading from 2 to 4GB and if so will I notice any performance increase?
>>
>>
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