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Building Mac OS binaries
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This guide explains how to build Electrum binaries for macOS systems.
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The build process consists of two steps:
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## 1. Building the binary
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This needs to be done on a system running macOS or OS X. We use El Capitan (10.11.6) as building it on High Sierra
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makes the binaries incompatible with older versions.
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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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cd electrum
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./contrib/build-osx/make_osx
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This creates a folder named Electrum.app.
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## 2. Building the image
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The usual way to distribute macOS applications is to use image files containing the
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application. Although these images can be created on a Mac with the built-in `hdiutil`,
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they are not deterministic.
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Instead, we use the toolchain that Bitcoin uses: genisoimage and libdmg-hfsplus.
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These tools do not work on macOS, so you need a separate Linux machine (or VM).
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Copy the Electrum.app directory over and install the dependencies, e.g.:
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apt install libcap-dev cmake make gcc faketime
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Then you can just invoke `package.sh` with the path to the app:
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cd electrum
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./contrib/build-osx/package.sh ~/Electrum.app/
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