License dont work with my Mac

I downloaded in my PC and try to use the same license with my Mac and the license is not working.
What can I do?

Are you seeing an error message?

say the license was being used

I did before use the same license to activate in my mac and my pc but this time I can not

Would you mind typing the exact message you are seeing? Or a screenshot?

… also Which version of SketchUp are you trying to license?