Can I purchase regular DDR3 RAM for my MAC (not from an iMac store?)

Solution 1:

Generally in principle yes. You do not need to purchase expensive Apple memory.

However you will need to check for each model - the best thing is to go to a reputable memory supply company website which sells certified RAM and look up your model.

You can search for them online but here is a respected store (I have no affiliations with)

http://www.crucial.com

Solution 2:

Just be sure the memory you buy meets the specifications on Apple's website.

It's a very common type of memory, 204-pin PC3-10600 DDR3 1333 MHz.

Solution 3:

Although memory chips conform to standards, there could be some minor variations. So it is advisable to buy from a seller who tests and guarantees compatibility of the RAM sticks for your Mac.

Two such stores in the U.S. that have served customers for a long time are OWC - MacBook Pro 2011 RAM and Data Memory Systems - MacBook Pro RAM. These are usually cheaper than Crucial and offer good warranties.