Apple hasn't sold a server since 2011. So the biggest iOS build farms on earth run on consumer hardware, and racks of laptops are more rational than they look. macOS is only licensed to run on Apple machines. There is no legal way to spin up a Mac VM on a normal server, which means anyone selling iOS builds in the cloud has to buy physical Macs and shelve them. AWS does exactly this. EC2 Mac instances are literal Mac minis sitting in Amazon data centers, wired into the network over Thunderbolt…