Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Ask Different is a question and answer site for power users of Apple hardware and software. It only takes a minute to sign up.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Is this RAM going to be compatible with a mid 2011 iMac 21.5"?
The RAM you are pointing are DIMM. Your iMac is only compatible with the SODIMM form-factor.