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electrum/contrib/osx/README.md

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Building macOS binaries

✗ This script does not produce reproducible output (yet!). Please help us remedy this.

This guide explains how to build Electrum binaries for macOS systems.

Building the binary

This needs to be done on a system running macOS or OS X.

Notes about compatibility with different macOS versions:

  • In general the binary is not guaranteed to run on an older version of macOS than what the build machine has. This is due to bundling the compiled Python into the PyInstaller binary.
  • The bundled version of Qt also imposes a minimum supported macOS version.
  • If you want to build binaries that conform to the macOS "Gatekeeper", so as to minimise the warnings users get, the binaries need to be codesigned with a certificate issued by Apple, and starting with macOS 10.15 the binaries also need to be notarized by Apple's central server. The catch is that to be able to build binaries that Apple will notarise (due to the requirements on the binaries themselves, e.g. hardened runtime) the build machine needs at least macOS 10.14. See #6128.

We currently build the release binaries on macOS 10.14.6, and these seem to run on 10.13 or newer.

Before starting, make sure that the Xcode command line tools are installed (e.g. you have git).

1.a Get Xcode

Building the QR scanner (CalinsQRReader) requires full Xcode (not just command line tools).

Get it from here. Unfortunately, you need an "Apple ID" account.

(note: the last Xcode that runs on macOS 10.14.6 is Xcode 11.3.1)

After downloading, uncompress it.

Make sure it is the "selected" xcode (e.g.):

sudo xcode-select -s $HOME/Downloads/Xcode.app/Contents/Developer/

1.b Build QR scanner separately on another Mac

Alternatively, you can try building just the QR scanner on another Mac.

On newer Mac, run:

pushd contrib/osx/CalinsQRReader; xcodebuild; popd
cp -r contrib/osx/CalinsQRReader/build prebuilt_qr

Move prebuilt_qr to El Capitan: contrib/osx/CalinsQRReader/prebuilt_qr.

2. Build Electrum

cd electrum
./contrib/osx/make_osx

This creates both a folder named Electrum.app and the .dmg file.

If you want the binaries codesigned for MacOS and notarised by Apple's central server, provide these env vars to the make_osx script:

CODESIGN_CERT="Developer ID Application: Electrum Technologies GmbH (L6P37P7P56)" \
APPLE_ID_USER="me@email.com" \
APPLE_ID_PASSWORD="1234" \
./contrib/osx/make_osx