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Barn 0.9.2: signed Barn.app and explicit SSH/exec arguments

In Releases 377 words 2 min
Signed and notarized Barn.app in the Apple Silicon release and Homebrew installation, plus the SSH/exec argument contract.

Released on 2026-10-30. Barn 0.x releases use GitHub’s pre-release channel.

Barn 0.9.2 includes the complete native macOS guest runtime in the Apple Silicon download and Homebrew installation. You can create Linux and macOS VMs after installing a single package, without installing Go or Xcode.

Install Barn · Download 0.9.2 · Source release notes

Changes

  • The Darwin arm64 archive contains barn, barn-hosts-helper, and Barn.app from the same source commit. All three executables use Developer ID signatures and are submitted together for Apple notarization; the app carries a stapled ticket and passes Gatekeeper assessment.
  • brew install pgsty/infra/barn installs the CLI, QEMU, helper, and native app. The CLI discovers the app under Homebrew’s libexec. macOS guests require Apple Silicon, macOS 27+, and a logged-in desktop session.
  • The helper is signed before its final SHA-256 is embedded in the CLI. Packaging checks the pair again after attaching the native payload to the release archive.
  • ssh, exec, mac ssh, and mac exec require -- before remote commands. SSH passes a command line to the guest shell; exec preserves individual arguments. Use sh -c with exec for pipelines or redirection.
  • Linux arm64/amd64 and Intel macOS continue to ship the CLI and helper for QEMU Linux guests.

Install and use 

brew install pgsty/infra/barn
barn version

# Linux guest
barn up
barn ssh
barn exec meta -- uname -a

# macOS guest on Apple Silicon / macOS 27+
barn mac doctor
barn mac up mac1
barn mac open mac1
barn mac ssh mac1

The first macOS VM downloads Apple’s restore image and prepares a reusable base installation. Supply an existing compatible IPSW with barn mac setup --ipsw PATH to use a local restore image.

Upgrade

Stop running Mac VMs before replacing the app, then run brew update and brew upgrade pgsty/infra/barn. VM disks and configuration remain in ~/.barn; no recreation is required. Update older SSH/exec scripts to use -- and pass exec programs and arguments separately.

For the download installer, specify BARN_VERSION=0.9.2 because GitHub’s releases/latest endpoint does not select pre-releases. The release includes four platform archives, Linux DEB/RPM packages, SPDX inventories, checksums, the installer, and the generated Homebrew formula. release.json records the exact source commit and pinned build tools.

Path, sharing, node-selection, and limit improvements implemented after this release are documented under Barn 0.9.3 Changes.

Last modified 2026-10-30