Who or what is ‘_mbsetupuser’?
As the name suggests, it is a process associated with setup, which, in this case is running as a result of the upgrade from 10.11.x to 10.[11|12].x+y or from 10.12.x to 10.12.x+y (and may also appear in upgrading from older versions to 10.11.x). This process does not appear after an update to 10.13.x. Unfortunately, though … Read more