Help installing SketchUp on Mac

I just downloaded Sketchup pro and it says to move it to aplication and I have but it is not regersting
what should I do?

You should have downloaded a .dmg file. Click this file to open it. It will display a dialog showing a SketchUp icon, an arrow, and an Applications folder icon. Drag the SketchUp icon over onto the Applications folder icon and release it there. That will install SketchUp in the Applications folder. Eject the dmg when the installation completes.