Apple released one of the very first digital cameras back in the day - The Apple Quick Take (https://en.wikipedia.org/wiki/Apple_Qu). Somewhere deep in their R&D facility I wouldn't be surprised if they are quietly working on a full speced ILC camera system - they could just license the Nikon Z mount (which is the most advanced and future proof mount of any other vendors - Nikon's real ace in the hole) or - as people have said here just outright buy Nikon - and apply all of their silicon / imaging knowlege to it.I wouldn't put it past Apple.