"Let us suppose that we had carried out production as human beings. Each of us would have, in two ways, affirmed himself, and the other person. (i) In my production I would have objectified my individuality, its specific character, and, therefore, enjoyed not only an individual manifestation of my life during the activity, but also, when looking at the object, I would have the individual pleasure of knowing my personality to be objective, visible to the senses, and, hence, a power beyond all doubt. (ii) In your enjoyment, or use, of my product I would have the direct enjoyment both of being conscious of having satisfied a human need by my work, that is, of having objectified man's essential nature, and of having thus created an object corresponding to the need of another man's essential nature ... Our products would be so many mirrors in which we saw reflected our essential nature."
This theory is as relevant today in the context of software development. In big companies, an individual developer can sometimes be very "alienated" from the final product.
Apple takes secrecy(alienation) to the extreme, where the developer is reduced to a cog in the system.