I want vray in my Mac 1book air
Did you download it, pay for it and install it?
You need to update your forum profile. There is no ‘Free Plan’ for License Type. The web version is free, but cannot run extensions like V-Ray. You need SketchUp Pro or SketchUp Studio license.
And unless you have subscribed to V-Ray separately, you need the SketchUp Studio license to run V-Ray for SketchUp.