Security, manageability, and lower TCO are why Macs should comprise 10 to 25 percent of a company’s work PCs.
An excellent article by Galen Gruman, which is a followup, or, really, a response to the comments on this article in InfoWorld: Windows 10 won’t save the PC.
If anyone, including those in IT, has told you that Macs don’t make sense in corporate IT, they’re still living in the 90s. While Macs don’t make sense in every situation, they make great sense in many more situations than they don’t.