I'm not trying to flamebait, but are macs so popular that it's just assumed that all new hires want one as their tool? At my company we're still asking new employees which platform they want to work on, is this falling out of fashion?
People who do some other stuff (heavy email users, some video/audio people) do sometimes use Windows (it's weird, but I think the Windows audio stuff is better for realtime now than Mac).
(the exceptions are people with FreeBSD, NetBSD, and Linux laptops)
I'd be pretty comfortable as a Silicon Valley employer only supporting Macs for office automation, and then either Mac or Linux for development workstations. If someone really wants Windows, s/he can support it independently.
The harder problem is phones -- there are people who are religiously attached to iOS and to Android, and you basically need to support both. There are pretty good MDM tools to cover both at the same time, but it does mean you can't push enterprise apps unless you do crossplatform development.
I'm not religious about platform choice, but I'd hate to see a future where developers are pidgeonholed with regards to their tools
Edit: currently 13 of 15 of our devs use Mac
A reasonable compromise is Mac laptop for office tasks, and a VM for development, and then a desktop development machine. If someone is super mobile as a developer, I could see a Linux laptop as an option.
The annoying thing is that if you really want security, you are basically stuck with Windows 7 or Windows 8 now, at least for desktop/laptops, and iOS or BB for phones. (Windows and platform management has gotten better -- OS X is actually the least secure OS in a major corporate environment today, due to lack of security and management tools. It's still decent for unmanaged use vs. Windows or Linux.)
In an environment processing highly sensitive information (say, a law firm working on M&As, or a print shop handling annual reports), where the tools aren't that essential to work, you could have a legitimate "you must use only our locked down systems" argument. I wouldn't really want to work in a place like that, though.
The long-term solution in high security environments is probably a mobile-based OS for desktop/tablet/mobile use, and then virtual desktop into either a super locked down existing desktop OS, or some new environment. For a lot of stuff, locked-down tablet/mobile (or ChromeOS) connecting to SaaS apps could probably do it.
I have many happy coworkers who use Macs, but please don't make me use one.
Note: I've been using macs daily, for hours from OS 6 to OSX 10.3, before I started using Windows and Linux more.
I had to babysit OS X all the time, due to its lack of a good package manager. This was years ago, I don't know if it has improved, but it grated me greatly.
Well of course, OS X has heavily improved since the early days (I'd call 'early' everything below 10.4). The surge of developers wanting to use OS X has also increased the demand for package managers, and so they came. First fink, then macports and nowadays most use homebrew. You install them once using the standard OS X pkg installation facility and then you're good to go - the range of 'backend software' packages in brew is comparable to apt-get I'd say. For everything from linux that needs a GUI I have a VM, for everything Windows-only I have another VM. There's never even a question whether I can run something locally - once you have that it's hard to give it up again really.
That being said, the best OS X release is probably 10.6, since then I don't like the direction very much - but on macs you're basically forced to use the newest OS (XCode compatibility, hardware compatibility once you upgrade your macbook). The iOSification hasn't been a dealbreaker to me so far, it's IMO still a better all round experience than any other notebook, especially considering the service quality, which is bar none where I live. Friend of mine bought a $2.5k lenovo - the board went dead after 1 month, they picked it up and he hasn't seen it since the last six weeks, no replacement. I had a similar issue with my rMBP - got it back, fixed, after 2 days. Similar stories about Dell. HP might be better, but their hardware is crap IMO. I just can't trust any other laptop manufacturer at the moment, which makes me sad.
Fink was only out of date because they weren't keeping it up-to-date (perhaps their builds weren't automated? That's pure speculation, I have no idea). Debian manages to keep things more or less up-to-date with more packages (and architectures) than Fink ever had.
Incidentally, if you put your Homebrew in /usr/local then it will often install using the "pour" technique which is pure binary distribution.
I loved Fink until it started languishing, and I love homebrew now: its "everything in git" philosophy and very-open-to-pull-request attitude of the maintainer make me optimistic that it won't slow down and become irrelevant like Fink did. I think that's the real difference between the projects.