The damage prompted him to carefully remove the VESA mount adapter yet again, to see if the iMac Pro itself was damaged, and he encountered similar scuffs on the chassis of the machine. Upon leaving the store, however, Nelson discovered that his iMac Pro's stand had been significantly dented and scratched. Nearly two weeks and one failed repair later, the iMac Pro was finally fixed and ready for pickup, with a new VESA mount adapter installed and the saga seemingly over. Unfortunately, the Genius Bar was not very helpful, as apparently only the Head Genius at that store was trained to service the iMac Pro. The support representative then declined to provide the name of the OEM or their contact information, according to Nelson, who gave up on the phone call and decided to visit the Genius Bar at his local Apple Store. Unable to remove the adapter, Nelson said he contacted Apple by phone, explained the situation, and was told that Apple could not provide support because the adapter is manufactured by a licensed OEM, despite being sold by Apple with Apple-branded packaging and documentation. Nelson acknowledges that the adapter is probably not designed to be taken on-and-off repeatedly, but Apple never warns against doing so, and switching back to the traditional stand at least once seems reasonable. The end result… I couldn’t remove the VESA adapter… ever. When I was backing out one of the five screws, which was not overtightened by the way, the screw head just broke clean off from the screw body, and it left the screw stuck inside of the screw hole threads. Nelson installed the adapter without issue, but ran into difficulties when he went to remove it a few months later:

Imac pro vesa mount adapter