Smart PLS is great (though not for Macs) but like any piece of statistical software, there´s a learning curve. If you´re struggling to get started, consider turning to these videos for help. They´re offered by the Georgia R School for free. They also offer rather accessible courses on PLS and R online.
Tutorial 1. How to Draw a Basic SmartPLS Path Model
Tutorial 2. Estimating the Basic SmartPLS Path Model
Tutorial 3. Bootstrapping, R-squared, Path Effects and SmartPLS Result Reports
Tutorial 4. Other SmartPLS Features
Tutorial 5. How To Obtain SmartPLS Path Modeling Software for Structural Equation Modeling
If you have access to more tutorials, feel free to share them. Knowledge is power!