Something wrong with my rhino

I am a beginner with rhino,
I have been working it to be fixed for hours.
I cannot find any reason why this does not work…

  1. curve tool does not work. when I try, it only gives me straight lines.
  2. When I make any box or anykind, it dissapears as soon as my mouse stop click. ( cannot see any of my result)

I have restored rhino like 3 times but it was not a correct solution for this.
I think there is problem with settings…? maybe?? I do not know anything about this.
I really need some help with this issue!!
I will attach a screenshot about this, cause I cannot upload any MOV…
so, in pic, the box is transparent… only shows when I select it.
and curve is just not a curve.
Screen Shot 2020-04-30 at 6.49.27 AM|632x499

The box should be transparent in a Wireframe working display mode.
I’ll assume you have not been playing around with the working display mode definitions.

Is your Mac up to date with Apple?
Are you running Mojave 10.14.6 or Catalina 10.15.4?

Please run the Rhino SystemInfo command and return the results in a reply.