Hi everyone, could use some help. I figured out that you can't change easily to the Apple VESA mount adapter on the late 2013 21.5" iMac, but rather you have to disassemble the iMac. I'm not afraid to do this, but I can't find a guide anywhere with instructions. Also, does the standard Apple VESA mount adapter work with the 21.5 iMac once you get it disassembled? Do the screws line up? I'd appreciate any help. Thanks!