How to edit a shared file on my Mac?

Hi,

Is it possible to edit a shared file on my Mac?

I know it is possible on the web, using Numbers/Pages/Keynote for iCloud Beta. But I was wondering if it is also possible to download and edit the file.

I think it is also important that the file automatically updates himself when edited on the Mac, so the other user could see my changes.

So I don't have to download the file --> edit it --> upload the file.

Hopefully there is a solution for this problem, otherwise I'm hoping this will come in the near-future!

Kind regards,

Berend