Mac Markdown viewer for AI agents, $1.9K in 30 days: Finder previews

A native Mac app for reading Markdown READMEs, specifications, and plans written by AI agents. Its $1.9K in the last 30 days is verified through the payment provider's API by TrustMRR (Stripe), as of September 30, 2026.

What it actually sells

MacMD Viewer is a native Mac app for reading Markdown files. It is aimed at Mac users and teams that share READMEs, hand over specifications, or review plans from AI agents without editing the source documents.

The app provides Finder Quick Look previews, syntax highlighting, Mermaid diagrams, live reload, a document outline, themes, and zoom controls. It also works offline and is available through direct installation, Homebrew, or Setapp.

How it charges

Some currency amounts appear on the pages we read, but none could be tied to the product's own price, so no pricing is stated here (pages read 2026-10-01).

Month by month

Monthly revenue as read from the payment provider by TrustMRR, in US dollars, as of September 30, 2026.

Month	Revenue (USD)
2025-10	$1
2025-11	$1
2025-12	$1
2026-01	$1
2026-02	$1
2026-03	$61
2026-04	$580
2026-05	$1,283
2026-06	$2,379
2026-07	$3,023
2026-08	$2,199
2026-09	$1,863

Where customers come from

The visible acquisition signals are its DMG download, Homebrew listing, Setapp listing, and Quick Look setup guide.

Email and X are listed as contact routes for bugs, feature requests, or writing about MacMD Viewer.

What stands out

Finder Quick Look opens formatted Markdown previews, including Mermaid diagrams, without requiring a separate reading window.

The site shows 13 customer reviews. It also says the app is about 16 MB and launches under half a second on Apple Silicon, combining a small footprint with a native Mac reading experience.

From the official site

For teams that work in Markdown. Share the README, hand over a spec or review a plan from an AI agent.

Syntax highlighting Code blocks that read like code.

Excerpts from the official website, fetched October 1, 2026.

Where it sits in the data

MacMD Viewer's $1.9K in the last 30 days is higher than 82% of the 5,602 projects with payment-verified revenue in our dataset; the median across them is $150. Within the “Utilities” category (433 projects) it is higher than 90% (category median $120). Snapshot: 2026-09-02 to 2026-09-30. The dataset only covers founders who chose to publish their numbers, so it leans toward businesses that work; use it for scale, not as an average.

Currency

All figures are in US dollars as published. A rough yuan or euro conversion is not applied here because prices, taxes and acquisition costs differ by country.

Could you build something like this?

My view: demand would come from Mac users and teams that regularly review Markdown documents, including specifications and plans written by AI agents. The buyer would be paying for focused reading, local files, and Finder previews rather than a general document editor.

My view: distribution would require building presence on Homebrew and Setapp while maintaining a direct download route. The difficult parts include competing with established Markdown tools, handling different document structures, keeping Mac compatibility current, and controlling support demand.

Verdict: Needs real work.

One thing to take from it

MacMD Viewer turns Markdown reading into a focused native Mac utility. Its clearest product choice is a read-only experience for documents that already exist, with Finder previews and support for the structures used in technical and AI-agent work.

Sources

MacMD Viewer official website, fetched October 1, 2026
MacMD Viewer pricing page, fetched October 1, 2026
MacMD Viewer about page, fetched October 1, 2026
TrustMRR: revenue verified through the payment provider's API by TrustMRR (Stripe), as of September 30, 2026

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure