Does LibreOffice run Mac 10.13.3

Application keeps loading from internet each time I try to use it.

It works fine for me on Mac 10.13.3. Maybe delete and download again.

Do you see it in your Applications folder?

You might consider using Collabora’s packaging of LibreOffice for Mac. I use it on 10.10.5, but it is now being well maintained, and I got the 6.0 series faster on Mac that I did on my Ubuntu machine. It works very well for me. There is a suggested donation, but it is not a required payment (I believe) – see the link at the bottom of this post for more information.

(I’m just a user with no affiliation to Collabora – just glad they’re doing what they do!)