iMac (21.5-inch, Mid 2011) with 4mg installed in 2 of the 4 memory slots. I want to replace them and add to have 16 mg. Wher shouls I buy the right I memory. Should is better to be installed at the store?
iMac, 21.5-inch Mid 2011 2.7 GHz core i5
Buy either at OWC (macsales.com) or Crucial.
OWC also has great install videos (it's pretty easy):
http://eshop.macsales.com/installvideos/
And pick your model here for the correct RAM:
http://eshop.macsales.com/shop/apple/memory/iMac
FWIW, Genius Bar does not install RAM that I know of - they may send it to an authorized provider though. But there is no need to spend that money since you can easily do it yourself.
Do it yourself. It's very easy to install. This Apple document shows how: Install memory in an iMac - Apple Support
Get the modules from Crucial.com. They are the most reliable provider of Mac memory out there. Next would be otherworldcomputing.com. Crucial is usually a bit less expensive than OWC.
Should I install ram myself or Ask Genius bar
