Below are some references for Rhino tutorials. Note some of these are Rhino for windows they are still really useful for Rhino for mac. Yes the interface is different but most commands are the same if you try a command and it is not there try googling it or ask.

Cage edit tool

https://www.rhino3d.com/tutorials

http://www.plethora-project.com/education/

http://www.rhino3d.tv/

http://www.digitaltutors.com/software/Rhino-tutorials