Download to Mac

I have downloaded sketchup to my Mac.
The install file was placed in my download folder.

The issue is that the sketchupmake-en.dmg has an additional file
extension .download

I have tried clicking on the file but nothing happens. And I tried to edit the file
name by removing the .download. But that does not help.

Can someone please offer ideas on how to deal with this?

Thank you

If you have the additional file extension .download means that the download isn’t complete yet. When the download is complete os X removes this .download extension.
Maybe best delete the file and download it again.