I had a older iMac that I wished to mount in my shop for reference and video.  Unfortunatly this design was the old model that did not have a removable stand.

I printed this design with 40% infill and 4 perimiters. The imac has been mounted in a garage that ranges in temperature from 0C to 43C depending on the time of year.  This mount has been solid for about 15 months, but due to the weight of the computer I recommend screwing the frame into at least 1 stud.