Get Posnic

Free forever for local use. No account, no trial clock, no telemetry. The database is bundled — there is nothing else to install.

Beta, and not signed yet — your computer will warn about an unknown publisher. What to do · Checksums

💿 Windows

Windows 10/11 · 64-bit · 159 MB

Download installer

or portable — runs from a folder or USB stick, changes nothing on the machine.

🍎 macOS

Apple Silicon (M1 and later) · 532 MB

Download for Apple Silicon

Intel Mac · zip for Silicon or Intel
Apple menu → About This Mac tells you which.

🐧 Linux

x86_64 · 214 MB · no install needed

Download AppImage

or .deb for Debian and Ubuntu — sudo apt install ./posnic_2.0.2_amd64.deb

⚠️ If your computer warns about an unknown publisher

That warning is accurate. A code signing certificate is on the way; until it arrives you are trusting the download rather than a certificate, which is why the checksums are published.

Windows — “Windows protected your PC” → More info → Run anyway.

macOS — you will see “Apple could not verify Posnic is free of malware”. That means the app is signed but not yet notarized by Apple, not that anything is wrong with it.

  1. Open Posnic once and press Done when it is blocked. This step is required — it is what registers the attempt.
  2. Go to System Settings → Privacy & Security and scroll down.
  3. Next to “Posnic was blocked…” press Open Anyway, then confirm.

On macOS 14 and earlier you can instead right-click the app and choose Open. That shortcut was removed in macOS 15.

Or, in one command. This clears the quarantine flag macOS puts on anything downloaded, which is what triggers the check:

xattr -dr com.apple.quarantine "/Applications/Posnic.app"

Only run that on software you meant to install, from a source you trust — it is the same decision as “Open Anyway”, made in one step instead of three.

Download only from this page and check your file against SHA256SUMS.txt before installing. Keep your own backups — this is a beta holding your sales.

🛠️ Build it yourself

The whole application is AGPL-3.0 open source. Nothing is held back — the installers above are built from this, by the workflow in the repository.

git clone https://github.com/Posnic/POS.git cd POS npm ci npm --prefix api ci npm run build # installer → dist/

The build fetches the bundled MongoDB for your platform. Use npm run build:mac or npm run build:linux to target the others. Ports are chosen per installation, so nothing is fixed to a particular number.

Already subscribed to Posnic Cloud?

Install on any machine, then in the setup wizard choose I have a Cloud account and sign in with your Posnic email and password. Your whole shop downloads automatically — items, customers, sales history and your login.

Not a subscriber? Choose Community Edition. It is free forever and you can move to Cloud later without losing anything.

All releases, checksums and release notes are on GitHub. Problems? See Support — the line is answered around the clock if your shop cannot trade.