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Build PowerShell on macOS

This guide supplements the Linux instructions, as building on macOS is almost identical.

.NET Core (and by transitivity, us) only supports macOS 10.11, per CoreFX issue #7731.

Environment

You will want Homebrew, the missing package manager for macOS. Once installed, follow the same instructions to download and install a self-hosted copy of PowerShell on your macOS machine, and useStart-PSBootstrap to install the dependencies.

The Start-PSBootstrap function does the following:

  • Uses brew to install CMake, OpenSSL, and GNU WGet
  • Uninstalls any prior versions of .NET CLI
  • Downloads and installs the latest .NET CLI 1.0.0-preview3 SDK to ~/.dotnet

If you want to use dotnet outside of Start-PSBuild, add ~/.dotnet to your PATH environment variable.

error: Too many open files

Due to a bug in NuGet, the dotnet restore command will fail without the limit increased. Run ulimit -n 2048 to fix this in your session; add it your shell's profile to fix it permanently.

We cannot do this for you in the build module due to #847.

error: dotnet restore

If you run dotnet restore and get error like

PS /Users/vors/dev/PowerShell> dotnet restore                                                                                         
log  : Restoring packages for /Users/vors/dev/PowerShell/src/TypeCatalogGen/project.json...
log  : Restoring packages for /Users/vors/dev/PowerShell/src/TypeCatalogParser/project.json...
log  : Restoring packages for /Users/vors/dev/PowerShell/test/PSReadLine/project.json...
log  : Restoring packages for /Users/vors/dev/PowerShell/test/csharp/project.json...
error: Unable to load the service index for source http://www.myget.org/F/dotnet-core/api/v3/index.json.
error:   The type initializer for 'Crypto' threw an exception.
error:   The type initializer for 'CryptoInitializer' threw an exception.
error:   Unable to load DLL 'System.Security.Cryptography.Native': The specified module could not be found.
error:    (Exception from HRESULT: 0x8007007E)

These means you did not use our Start-PSBootstrap function to setup your environment, which handles patching .NET Core's bad cryptography libraries. Please see our macOS installation instructions for explanation.

Build using our module

Instead of installing the Ubuntu package of PowerShell, download the pkg from our GitHub releases page using your browser, complete the wizard, start a powershell session, and use Start-PSBuild from the module.

The output directory will be slightly different because your runtime identifier is different. PowerShell will be at ./src/powershell-unix/bin/Linux/netcoreapp1.1/osx.10.11-x64/powershell, or osx.10.10 depending on your operating system version. Note that configuration is still Linux because it would be silly to make yet another separate configuration when it's used solely to work-around a CLI issue.