Where I can buy more memory for my iMac

Macs are fussy about RAM. Both Crucial and OWC are reliable vendors with high quality RAM.

Be sure to check to see if your Mac RAM is capable of upgrading. Some iMacs are and some are not. Best to use the tool on either website to identify your exact model iMac and the exact type of RAM it needs.

Both OWC and Crucial are quality RAM manufactures, so I buy from the one that has the best price.

Which iMac do you have? Please understand that upgrading RAM in 21.5-inch iMacs that are Late 2012 needs professional installation and, with some sub-models, RAM upgrades are impossible.

OWC prices are generally lower than Crucial.

You're welcome.