MacOSCLIDistribution
title: macOS CLI Distribution radar_quadrant: Techniques radar_ring: Assess radar_position: center created: 2026-05-22 last_updated: 2026-05-22 related: ["CLIPrintingPress"]
macOS CLI Distribution is the standard pipeline for shipping command-line tools to external macOS users: universal binary compilation, Apple code signing and notarisation, a Homebrew tap for installation, and optional auto-update via the Sparkle framework.
Step 1 — Universal binary: Compile separate arm64 (Apple Silicon) and x86_64 (Intel) builds and merge them with lipo. A single binary runs natively on all modern Macs without Rosetta.
Step 2 — Code signing: Sign the binary with an Apple Developer ID certificate. Unsigned binaries trigger a Gatekeeper quarantine warning on first run that most users cannot dismiss without navigating System Settings.
Step 3 — Notarisation: Submit the signed binary to Apple's notarisation service via notarytool. Apple scans for malware and staples a ticket to the binary; macOS marks it safe without a warning dialog. Required for any binary distributed via the internet since macOS Catalina.
Step 4 — Homebrew tap: Create a personal Homebrew tap (brew tap yourname/tap) with a Formula file pointing to the signed, notarised binary. Users install with brew install yourname/tap/tool. No submission to the official Homebrew repository required.
Step 5 — Auto-update (optional): Integrate the Sparkle framework to deliver in-terminal update notifications, so users do not need to re-run brew upgrade manually.
macOS CLI Distribution sits at Techniques → Assess center. The code-signing, notarisation, and Homebrew tap combination is the standard distribution path for any macOS CLI tool targeting external users — skipping it results in Gatekeeper warnings that kill adoption. Center position reflects conditional applicability: the technique is only relevant when shipping to users outside a controlled environment; internal tooling distributed via brew install --HEAD from a GitHub URL does not need the full pipeline. Directly complements the CLI Printing Press blip (Tools → Assess inner) — that tool generates the CLI; this technique ships it. The remaining gate before moving inner is a completed end-to-end distribution of a real CLI tool including notarisation and a working Homebrew tap.
