Idea visualization and interface drawing program for MacOS?

Question

macOS

In general, we need a program for a visual representation of the idea + a sketch of the interface for the application. I read about 2 weeks ago on Habré about web applications of this type, but now I just can’t find it :( (as usual).
PS I write for iphone, if it plays a role.
Who will advise what for mac?

Answer 1

I use Balsamiq Mockups (http://balsamiq.com/products/mockups)
The product is paid but there is a trial version and a web demo.
The AIR program therefore runs on any OS.

Answer 2

Axure