Sorry no the engineering shop I work in uses solid works on custom windows workstations. However a customer came in a few months back with solid works running via bootcamp on a MacBook pro.
As for Mac compatible engineering apps. I know Autodesk fusion 360 is available for Mac as well as other Autodesk software. I know of some others but for the life of me can't remember the names.
there's AutoCad and Alias from Autodesk..
Rhino is on Mac (which is what i personally use)
(Grasshopper for Rhino is also on Mac now though still in beta.. still very usable in its current state)
a few others which may be used in more specialized 'engineer' fields would be Vectorworks, Modo, Cinema 4D, Maya, Moi3D, Blender, SketchUp, and openSCAD.
Apple designers/prototypers use Alias and Rhino.. that said, i imagine they also have boot camped machines running NX and Catia.. and the likes as well as CAM software (which is sorely lacking on macOS).
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that aside, the GPUs in the upper end Mac builds are good to great for all of this software.. (like, the Radeon560 in the MBP or the 580 in the iMac).. it's highly unlikely you're going to get better CAD performance using more 'pro' GPUs than these.
(unless we're taking something like GPGPU based rendering or simulations or something.. in which case, more vRAM generally equates to larger scenes being able to be computed at a faster pace)
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3D modelling on the other hand, that would definitely need ECC memory.
how so?
idk, i don't think i've ever experienced a bit flip when modeling (though i very well could have).. thing is, with modeling at least, you see the results.. if there's an error, you'll very likely notice something went weird..
further, the more adept designers/engineers/modelers are triple-checking their work.