where can I find the memory slot in this computer
I can not find the slot for expanding my memory in the iMac 21,5 2017
iMac 21.5″, macOS 11.6
Welcome to the Apple Support Communities.
iMac 21.5 does not have a Memory Access Door. You cannot upgrade the Memory in an 2017 21.5" iMac, only an AASP might be able to.
However, is there a reason you were wanting to upgrade the Memory?
Jack