Those devs do still need a Mac and (most likely) an iOS device too. There's your dev kit. Edit: It's even worse than with consoles as every dev needs at least

Those devs do still need a Mac and (most likely) an iOS device too. There's your dev kit. Edit: It's even worse than with consoles as every dev needs at least a Mac. When developing for consoles most work is not done on the dev kit itself.