This mounts the 2007 20" iMac(no VESA option) to a wall with no problem, the top will slide over the top of the stand and lock in place with screws.

I printed this at .2mm layer height with 5 perim and 5 top/bottom layers
50% infill with recti worked well, but less infill with hex would work fine i believe. Total print took 28 hours on my MendelMax 2 and the final product is 3 pound exactly so it took about 1.3 1KG rolls