Download
Download MApper.
A self-contained desktop build for macOS and Windows — the React UI and the Python/Brightway2 backend in one app. No conda, no terminal needed to run it.
v0.1.1
Download for macOS (Apple Silicon)macOS · Apple Silicon (M1 or later) · ~442 MB
Windows build coming soon — check back shortly
Other platforms (macOS Intel, Linux) are not yet available.
Install & first run
macOS
01
Drag MApper into Applications
Open MApper_0.1.1_aarch64.dmg and drag MApper into your Applications folder.
02
First launch — right-click → Open
This is a trusted build that isn't yet code-signed (signing is deferred), so macOS Gatekeeper blocks a normal double-click the first time. Instead, right-click (or Control-click) MApper.app → Open → Open in the dialog. You only need to do this once; afterwards it opens normally. If macOS still refuses, run this once in Terminal, then open it normally:
xattr -dr com.apple.quarantine /Applications/MApper.app
03
First launch is slow — not a hang
On the first launch the app shows nothing for up to ~2 minutes while the embedded backend self-extracts (and builds a font cache on the very first run only). This is normal — the window appears once the backend is ready. Later launches are faster.
Windows
01
Run the installer
Open MApper_0.1.1_x64-setup.exe and follow the installer.
02
SmartScreen — More info → Run anyway
This is a trusted build that isn't yet code-signed (signing is deferred, same as the macOS build), so Windows SmartScreen may warn the first time. Click More info → Run anyway to continue.
Bring your own data
On both platforms, MApper needs your own ecoinvent license and a Brightway2 project, which you set up once from inside the app (Database Explorer → import). ecoinvent is separately licensed — MApper neither bundles nor distributes it. UI-only features still work before a database is imported. See the license page for details.
Open source
Both the macOS and Windows builds are the same MApper software, released as open source under the Mozilla Public License 2.0. Browse the source on GitHub or read the LICENSE in the repo.
Prefer to build from source? View the repository →