OSX connects to wireless networks much faster, and also occasionally Linux won't connect to a network at all while OSX does. This might not be a problem when you just use your computer at home but if you are a consultant and you're at the customer's office, you just don't want to run into those connection problems which Linux occasionally gives.
Driver support for new hardware platforms or one where the hardware producer does not help enough might not be that good: I think Intel's Skylake platform might serve as a good example – an older Linux kernel had a bug where laptops would crash when the lid was closed; now that Skylake is older the bug has been fixed.
That being said, Linux has drivers for many more stuff out of the box than every other operating system. Of course, for the perfect out of the box experience, you have to choose matching hardware – same as with OS X actually.