I use SharkCAD Pro as a complement to TC PC, it's the same fundamental program as TC Mac, and the UI is the same for Mac and Win. The interface is 'lighter' than TC PC, probably fewer tools, which isn't to say that it's less powerful, but that you'd (well, me, anyway) be less likely to be setting up custom interface for less-commonly used tools. It has a snap system that they call 'Logicursor' that I find pretty good, it's perhaps less obtrusive than TC's. One way that it's very different to TCPC is that it can use surface edges as geometry, so you can put surfaces together and stitch them into solids in ways that TC can't. In other things like shelling, you get the same results and capability as TCPC, they both use ACIS. Toolbars are very flexible, they fly out and tear off to stay open in the drawing window fluidly, with a single pass of the mouse, which I find excellent to use on Windows tablets, ironically, because I just use 'em, close 'em, reopen when needed because it's that fluid, although it's right-handed, the toolbars only tear off to the right.... It's got good part history and associations, different to TCPC but similarly useful. It has a capacity called 'model-to-sheet' which is like a combination of drafting palette and paper space, but it doesn't have paper space; it does its sheet views on a dedicated 2D layer in model space, quick and easy enough, but not as powerful or flexible than TCPC, which is more like AC's. Rendering is Lightworks, implemented a bit differently to TCPC but similar results. A new version of PunchCAD's just gone on sale and I assume its features will be migrated to TC Mac, it now has DCM constraints like TCPC, it had them a few versions back but they disappeared, now returned, and in older versions it didn't have all of the geometric constraints that TCPC has, but it did have animation, which PC doesn't. Some of Shark's features weren't available on Mac, file exchange formats and some ACIS capacity, I don't know if that's still true or relevant to TC Mac's feature set. The program's also similar to Ashlar Vellum Cobalt, also the same code base. I can't imagine loving Mac hardware, OS or dedicated programs enough to abandon TCPC or having to VM it.