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Building macOS binaries
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=======================
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✗ _This script does not produce reproducible output (yet!).
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Please help us remedy this._
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This guide explains how to build Electrum binaries for macOS systems.
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## Building the binary
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This needs to be done on a system running macOS or OS X.
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Notes about compatibility with different macOS versions:
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- In general the binary is not guaranteed to run on an older version of macOS
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than what the build machine has. This is due to bundling the compiled Python into
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the [PyInstaller binary](https://github.com/pyinstaller/pyinstaller/issues/1191).
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- The [bundled version of Qt](https://github.com/spesmilo/electrum/issues/3685) also
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imposes a minimum supported macOS version.
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- If you want to build binaries that conform to the macOS "Gatekeeper", so as to
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minimise the warnings users get, the binaries need to be codesigned with a
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certificate issued by Apple, and starting with macOS 10.15 the binaries also
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need to be notarized by Apple's central server. The catch is that to be able to build
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binaries that Apple will notarise (due to the requirements on the binaries themselves,
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e.g. hardened runtime) the build machine needs at least macOS 10.14.
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See [#6128](https://github.com/spesmilo/electrum/issues/6128).
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We currently build the release binaries on macOS 10.14.6, and these seem to run on
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10.13 or newer.
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Before starting, make sure that the Xcode command line tools are installed (e.g. you have `git`).
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#### 1.a Get Xcode
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Building the QR scanner (CalinsQRReader) requires full Xcode (not just command line tools).
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Get it from [here](https://developer.apple.com/download/more/).
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Unfortunately, you need an "Apple ID" account.
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(note: the last Xcode that runs on macOS 10.14.6 is Xcode 11.3.1)
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After downloading, uncompress it.
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Make sure it is the "selected" xcode (e.g.):
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sudo xcode-select -s $HOME/Downloads/Xcode.app/Contents/Developer/
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#### 1.b Build QR scanner separately on another Mac
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Alternatively, you can try building just the QR scanner on another Mac.
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On newer Mac, run:
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pushd contrib/osx/CalinsQRReader; xcodebuild; popd
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cp -r contrib/osx/CalinsQRReader/build prebuilt_qr
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Move `prebuilt_qr` to El Capitan: `contrib/osx/CalinsQRReader/prebuilt_qr`.
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#### 2. Build Electrum
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cd electrum
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./contrib/osx/make_osx
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This creates both a folder named Electrum.app and the .dmg file.
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If you want the binaries codesigned for MacOS and notarised by Apple's central server,
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provide these env vars to the `make_osx` script:
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CODESIGN_CERT="Developer ID Application: Electrum Technologies GmbH (L6P37P7P56)" \
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APPLE_ID_USER="me@email.com" \
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APPLE_ID_PASSWORD="1234" \
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./contrib/osx/make_osx
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