tl;dr :<p>- TouchBar appears to be denoted as Watch2,5 running watchOS 3.0-14Y36.<p>- TouchBar OS is stored on EFI partition.<p>- Setting date to 1.1.1970 triggers iOS date problem and makes mbpro unresponsive for some time.<p>- Deleting file(s) on EFI partition triggers critical software update.<p>- TouchBar iOS seems to 'activate' calling Apple servers.