Scriptease is an offline macOS app for professional screenwriting AND full production management in a single project file. Write a scene and it flows into breakdown, stripboard, a Movie-Magic-style budget, and call sheets. No script yet? Start from a scene list. TV season? One project, one screenplay per episode. 100% offline, private, one file on your disk. Buy once: $99.99, no subscription. Mac only. Free 14-day trial, no credit card.