Files are locked ( single reading ). I cannot save. HELP!

Hi all! I have this message when I open my files.
It’s a problem cause I cannot save my changes.

Is it a bug?

“Le fichier est actuellement verrouillé. Il a été ouvert en lecture seule.”

Thanks for your help!!

Try File > Save As… (and give it another name)

On Mac that should only happen if the file is already open in another copy of SketchUp. That can easily happen on Windows, but harder on Mac, unless you have a different version of SketchUp open at the time. When you see the message, check if more than one SketchUp is open.