I have looked and worked with all the ones already mentioned, but I have to stress: I recommend Fusion 360 just like I would recommend you SolidWorks if you were working in the industry.rforeman wrote:Autodesk Fusion 360.
If you are a hobbest or a start up company you can register and use it free. Easy to learn.
Once you grasp how the interface works and where everything is, it will just click.
You can approach your designs via a sketch, or simply draw primitives until you have what you want - or sculpt your designs away.
Built-in tools that allow you to import STLs (you technically upload them to the cloud, and a server processes them for you) and use as a reference for your design help a lot as well.
It is not for everyone, but if you have already made use of CAD programs out there and would like something like AutoCAD without the complicated ribbon interface (the only thing I like about AutoCAD for MAC is the interface), then Fusion 360 is for you.
Sorry if I sound like I work for them - but it is the only piece of software that I have been able to work with quickly and easily.
And this is coming from someone with access to SolidWorks, AutoCAD Mechanical 2016, Moi (another good piece of software), 123D (crashes too much for my taste), FreeCAD, Autodesk Inventor, Meshmixer, OpenSCAD, Rhinoceros, TurboCAD Mac Pro 8, etc. You get the point, lol.