Name a modern schematic capture/PCB layout package that runs on OSX. OrCAD, PADS/PCB, or Altium (used by Apple) all run on Windows only. There are a few, tiny hobbyist programs, but nothing mainstream that paying customers would want.
Name a 3D parametric CAD package that runs on OSX. Solidworks, NX, Creo (used by Apple) all run on Windows only. There are a few, tiny hobbyist programs, but nothing mainstream that paying customers would want.
Oh, and OSX is about 6% of the total market. That's a strong 2nd place to the ~92% Windows market share! But at least it's ahead of Linux so you go that going for you...
Nice strawman you got there! The original premise was that Mac USERS used Macs because the USERS were non-technically-adept. When I provided some anecdotal evidence in the form of several long-time Mac-using friends of mine (plus myself) who most certainly belied that stereotype, you pivot the argument to whether the MAC (not the USERS) was "incompetent" (had no available software) to use with "electrical design" work. Nice try!
But to answer your "challenge" anyway, I will say this, regarding my own experience trying to do embedded hardware and software development on Apple equipment since 1980:
Of course it has always been a challenge to find tools for electronic hardware and software design on ALL non-Windows platforms. But unless you are doing really high-end stuff, it has always been possible. And now, even some of the high-end packages are starting to come around.
One of the brightest areas comes in the form of software toolchains for embedded development. Many major microcontroller OEMs, such as Microchip, ST, Atmel, and others have released full, and fully-supported, development toolchains (one of the first being Microchip, who achieved a major headstart by purchasing the makers of Hi-Tech C compilers, which already had Mac versions of their compilers). And the list grows every year. And some people even use an Eclipse-based toolchains and even XCode to do embedded development. So actually, the software dev. side is getting pretty good at this point.
The hardware design side isn't as rosy; but it too, is gradually getting better each year.
As far as schem. Capture, simulation, and PCB design, one of the most competent packages (with the world's worst website!) is a package I personally used back in 1984 on the original 128k "toaster Mac": VAMP Inc.'s McCAD. It offers full-blown and integrated capture, simulation, PCB layout and Auto-routing modules, all of which are quite "competent", and in no-way "hobbyist" level. The pricing alone will dispel any of those allusions! As I said, don't let the amateurish website fool you: This is the real deal. I have used both OrCAD (extensively) and Altium (yes, both on Windows), and I can tell you that McCAD is easily their equal. By the way, OrCAD (and Cadence itself) is one of the nastiest, buggiest, most uneven pieces of shit I have ever used, and ultimately drove my employer at the time to switch to Altium (which I feel is only superior when compared with the POS that is OrCAD). I have only played with PCAD/PADS in demo versions, so I can't speak to them.
The other solution is Eagle, which has offered an OS X-native (Cocoa) (rather than just an X11 port) version of its integrated design package for over a decade. Although it most definitely has its roots in the hobbyist world (and still offers limited hobbyist and educational editions), it has grown into a pretty nice package (with "pro-level" pricing to match!), with some wonderfully-unique features, such as a flexible scripting language that can be used for all sorts of typical and atypical things, a lot of which would be difficult, if not impossible, on any other design suite. So don't diss Eagle.
As far as CAD/CAM goes, the picture is bright and getting brighter. The biggest news comes in the form of Seimens PLM/NX, which has had a fully-supported Mac version since 2009. So, do try to keep up. And I have seen an "interview" that strongly alludes to the fact that full-blown PTC Creo is coming to the Mac. After all, they already have a few specific iOS Apps. Solidworks remains Windows-only, but with NX (and possibly Creo) being available, who cares if they don't get it. Oh, and let's not forget Vectorworks and AutoCAD. They are both quite competent CAD packages, and most certainly not "hobbyist"-class stuff. I haven't looked in awhile to see if Autodesk Inventor has been ported to OS X, but considering how tightly-integrated it is with certain video drivers, I wouldn't hold my breath. I frankly have always thought that AutoDesk made some of the most overrated products on the planet, and that, for 2D/3D CAD, that VectorWorks easily mops the floor with AutoDesk offerings.
But as I said, none of that is relevant to the original assertion that Mac USERS are ONLY using Macs because THEY (the USERS) just don't know enough to use anything not "dumbed down" (as if).
So, without posting resumes, I hope this is enough to make you apologize for, or at least acknowledge the fact, that your statements might have been JUST a little over-generalized and stereotyped.