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Windows & macOS

Two routes: the one-click installer, or — for the very latest build — finish the install on your own machine.

One-click installer

Download the installer for your platform from the downloads page. Filenames are version-stamped (Scelo-IDE-<version>-x64.exe, Scelo-IDE-<version>-arm64.dmg); the download tile always points at the newest build for your platform.

  1. Download the .exe from the Windows tile.
  2. Run it. SmartScreen may warn ("unknown publisher") — click More info → Run anyway (the installer isn't code-signed yet).
  3. Follow the installer (you can change the install directory).

For Apple Silicon Macs (M1 or later) on macOS 14 Sonoma or later. There is no Intel build: the bundled Python is an Apple Silicon build.

  1. Download the .dmg from the macOS tile and open it.
  2. Drag Scelo IDE onto Applications.

  3. Clear the download flag once, in Terminal. The app is not signed or notarised by Apple yet, so macOS quarantines it; this lifts that for the app and for the Python, R and swarm programs bundled inside it:

    xattr -dr com.apple.quarantine "/Applications/Scelo IDE.app"

  4. Open Scelo IDE from Applications.

Without Terminal: open Scelo IDE, close the warning, then go to System Settings → Privacy & Security, scroll to "Scelo IDE" was blocked… and click Open Anyway (on macOS 14 you can instead Control-click the app and choose Open). If Scelo then reports that its Python, R or swarm cannot start, run the command in step 3.

If macOS says Scelo IDE "is damaged and can't be opened", that is the same quarantine flag, not a broken file: step 3 fixes it.

Build the latest on your own machine

When you want a build newer than the last signed release, you can finish the install locally. The app code is identical on every OS; only the Electron runtime and the bundled Python/R differ, and those install natively on your machine.

1. Get the source (a small download):

git clone https://github.com/intelligentactuaries/scelo
cd scelo

2. Run the finisher — it fetches Electron + the Python/R runtime and builds a native installer:

bash scripts/finish-install.sh
The installer lands in apps/scelo-ide/build/ (…arm64.dmg).

Install Git for Windows, open Git Bash in the scelo folder, then: 

bash scripts/finish-install.sh
The installer lands in apps/scelo-ide/build/ (…x64.exe).

Just want to run it without building an installer?

bash scripts/finish-install.sh --run

Note

The first run downloads ~1 GB (Electron + the bundled runtime) and can take 10–30 minutes (R compiles a large package set). After that, Scelo runs fully offline.