Help, received an iMac and need info.

i have just received an iMac model M5521 from a friend, and would like some information on how to use it. i would like to know how to connect it o the internet,pop its case open so i can update RAM and hard drive, and maybe how much it is worth. any help?

Your post was moved to the correct forum as it does not belong in the "Lounge". Please read forum descriptions before posting.

Welcome to the Mac Forums. I also edited your title to better reflect your question. A title of just "Help" is not appropriate to get responses. Also, please use our forum search function which I think you will find to be adequate in answering most of your questions.

Thanks.