User interface issue

Hi, I am unable to select items in the general 'window' outside of the drawing space, does anyone else have this issue? Basically, my cursor works inside the drawing space and I often type commands so there is no problem drawing. The issue is when wanting to select something from a menu or window. The cursor is not visible. I can randomly hover and hope to click the correct option but this is really not of any use. I am especially stuck when using the sheet set up. Any help would be much appreciated, please. I am using a MacBook Air.