I’ve been building Header, a Markdown notes app for Mac, and the free public beta is open.
Your notes stay plain .md files in a folder you choose, so the same folder works in Obsidian or any editor. Wiki links, backlinks and a graph, plus meeting recording with transcription that runs on your Mac.
AI is optional: off until you add your own key.
Free download (notarized) or TestFlight: https://headernotes.com