I have an older iMac desktop computer good for a student or for the Kids... It is not the fastest by today's standard not the fastest... The 20" Silver is loaded with El Capitan & runs on Intel core 2 Duo 2.4 GHz processor with 3gb of RAM installed & 250GB Hard Drive. run fine although the Silver is a little slow the other the 17" was just given to me today to use as a backup to my laptop. I have 2 Mac Keyboard for this computer one original from the 20" slim silver metal style but with few sticky key lie the letter E D & sometimes the Cap Lock sty on The other Keyboard is a McHally for Mac & I also have 2 regular wired Mac Mouses & 1 Microsoft Mouse & one wireless mouse.Logitec & the original apple mouse. these are cool in that you can use another monitor as displays & It's old Mac Tech what's not to like Sorry though no mouse or Keyboard for those 2 computers This iMac work fine although a little slow But it can still be useful to do email & browse the internet and use as a good reliable desktop This 20" is up to date to the Max operating system based on memory size & components "Mac OS El Capitan" but I have the Snow Leopard DVD to upgrade... Silver iMac= $100