See the problem?
Most of you want to stay with the same old failed systems: Windows! Look at what a success that has been. Cheap? Have you ever worked in a shop that uses mainly Dell? I have, several times. The cost of the native hardware, with Windows or Suse or Redhat (or self installed Slackware or Suse) was not much lower, especially with the Gold support needed. Then, the failure rate was "awesome". I recall getting a batch of six higher spec. laptops. All were under repair within six months, two of them twice and not for user damage, just straight, hardware failure. The desk tops were scarcely better, though the servers, once one called in the engineer to fit the ordered parts rather than what arrived, were not so bad.
Do n't give me Linux: all the Linux sites kept Windows for the office work and engineers tended to switch to Windows straight or via virtual machine to do documents or read email, run calendars .... Plus, the maintenance was no joke (one of the firms had a very well developed means of distributing and maintaining Redhat, even so it was not wonderful to administer).
Actually, OS X is not bad, based as it is on BSD and with full LDAP as standard. You can even buy the full MS Office suite for it (and it works). It just depends upon what software you need to run for the majority of your users. The hardware tends to be rather good in comparison with the opposition (though my old Thinkpad is nearly 11 years old and still going). Unlike you, I have come across a few OS X users of the senior sort who use them for work, in a work network. They seem to cause less trouble than most and manage more than adequately without costing a fortune.
So, throw off your prejudices and lack of experience and listen to the man. Just because yo do not like what he says does not make him completely wrong. We can hardly claim that "professional" IT types have done a wonderful job of cost control, engineering, design or implementation. If we are all so wonderful, how is it that we could not make good, solid cases to our paymasters for our perfect plans. Just look at the rubbish interfaces most of our users have to suffer and the arrogant attitude to those not sharing our prejudices and having other priorities, like their business or entertainment.
Or do you believe that everyone who owns a domestic appliance or a car should understand how it works and how to service it, for example? Work or play, for the vast majority, computers are just a means of getting things done, not an end in themselves.
And for those sniffy about style: most of us appreciate good design and attractive objects at home or work and expect to pay more for them. Otherwise we should all sit on packing cases at work and use planks on trestles for desks, in rooms consisting of bare concrete floors and walls etc...