Check this page out for different details: https://developer.apple.com/business-chat/
There are certainly groups where Macs are popular. Startups use a lot of Macs; when I go to a coworking space in Boulder mostly everyone has a Mac. They're super common in cafes as well.
But not everyone uses a Mac. Not everyone likes Macs (myself included).
[1] https://insights.stackoverflow.com/survey/2017#technology-pl...
All the servers that run the code I write are Linux machines, so I would say I develop 'for' the Linux platform. However, I use a mac laptop to type that code.
The vast majority of developers out there are using Windows. I would believe the majority of start-up engineers are using Macs, but the world of software development is probably 100x that of "start-up engineers."
Ahhh, anecdotes.
Also, you know ZERO developers who use Macs? That seems crazy, or you don't know many developers.
Apple is already 'established' as a 'viable work computer'. Moreso than Linux at least.
Depending on what industry you're in you'll find quite a solid adoption of Mac computers used as 'daily drivers' for people.
However, statistically Apple computers certainly are not, in aggregate, established as work computers.
Windows maintains continuing dominance at 90% market share of the desktop market, and optimistic projections from Apple-favorable sites estimate about 8% market share, with Linux at about 1-2%. [1]
You can think Apple tech is good but recognize in the workplace Apple has presently lost and is playing catch-up.
[1] http://appleinsider.com/articles/16/04/11/apple-grows-to-74-...
Sure, maybe these aggregated 'market' figures tell a different story than what I've seen anecdotally, but they seem to be doing fairly okay in 'the workplace'
Windows and linux environments currently appear to reign supreme over the workplace, the former because of programs like Skype and outlook integration, the latter for ease of development. I think Apple has a long uphill battle attempting to break into the industry against the value-sell of existing options.