Highland

Great app, regularly updated and supported. But if you already own and use Scrivener or Ulysses and are used to those apps' workflows, Highland might not offer much in addition. (I own all three.)

The free version is a basic monotype font screenplay text editor. It doesn't have an access to the macOS text editing features. Apparently, the app began its life in the Windows world. Therefore, the text editing GUI has a minor learning curve. Some nice features specific to screenplays are accessible. Exports to PDF format are watermarked as "Made in Highland". Also note that it phones home to Google Analytics. :-(

The Pro version costs $50 at the Mac App Store. Since there is no public documentation as to what the 'Pro' version offers, here's a synopsis:

1) Access to Templates, which are...
• Fountain Templates:
- - Stage Play Screenplay
- - Multi-Cam Screenplay
- - Graphic Novel
• Markdown Templates:
- - MLA Report
- - Novel
- - Guidebook
- - Manuscript
- - Treatment
- - Article
- - Journal
- - Bulletin
• Unformatted Template:
- - Plain Text
2) 10 Editor Themes ("Dark and light color palettes perfect for any mood")
3) Watermark-free PDF
4) Priority Support Access

I recommend testing if you get used to the and enjoy the free version before paying for the Pro upgrade. If you have another scripting / creative writing app, you may prefer it to Highland. That's my experience so far. But it's certainly useful.

I purchased the original Highland app thinking I might write a screenplay, but I never did. Highland 2 is a much more versatile writing app that you will find yourself using daily. Start by checking out their video ==> https://vimeo.com/254361080

I use Highland, Fade In and Scrivener. That is all you need to write a novel, a screenplay, a PhD, a poem and just about anything you can think of - even a birthday card. These are the three classic apps now for writers. You can have absolute confidence in them all if you write for a living or live for writing.

the app store wants $39.99 not $29.99 as stated here.

A great application that is unfortunately a little bit pricey.

Excellent. Does precisely what it says, and does it beautifully. Great for getting the stuff down (though eventually it'll need -- probably -- to go through one of the prehistoric Cruft Machines like Final Draft or MMScreenwriter) and the intelligent formatting of plaintext means, surprisingly, an end to all that old stuff about "Why the hell are all these Action elements being formatted as Dialogue?" and tedious reformatting. And it does stage play format. AND lyrics. Hurrah. The only thing is, there's not so much steampunky fun in formats and revisions and so on that you get with the oldsters. If you're doing this for a living, that's good. If you're doing this for a hobby or because you want to write screenplays/stage plays one day (this is emphatically NOT a sneer) you won't feel quite so... not sure what the word is... "validated", I suppose. You know; "I'm using Final Draft so at least I'm using the same software as [insert name of hero writer]". We've all been there, and it's comforting. But for actual work, with someone scowling outside the door, tapping their foot and drumming their fingers, this is a Good Thing. (And the Melting PDFs feature is *really* cool.)