Mocksyy is a native wireframe and mockup studio for the Mac. You sketch an interface with real controls, turn the fidelity dial when the idea is ready to look finished, link screens into a flow you can play, and hand a developer a compiling SwiftUI package.
First Launch
The welcome window asks three things: the name to show on your comments and version history, where you want to start, and the fidelity new documents should open in. Every answer is optional and every one can be changed later in Settings.
The name stays on this Mac. It is a label on comments and versions, not an account.
The Demo Projects
A fresh install opens with two complete demo documents. Fernwell Banking is a nine-screen phone app with alternates, components, and a board. Atlas Console is a six-screen desktop dashboard in Mockup fidelity.
Open either one to see the editor, flows, review, history, and play with real content before you draw anything yourself.
Where Your Files Live
Each document is a .vellum package on disk. By default it lives in iCloud Drive and syncs between your Macs; a folder on this Mac works just as well.
Everything works offline. Nothing is uploaded to a server you do not own.