El Capitan Mono bug

As you know, Mono isn’t working anymore on El Capitan.

Do we have to expect a new Monogame framework upgrade for the fix, or we just have to use the fix provided by Mono ?

There is nothing that MonoGame can do for this. It is up to Xamarin to release an update that fixes it. More information can be found here. A preview release (hasn’t gone through the testing process) can be found here.