OSX Build Notes.txt

Steps

1. Update Microsot.Portable.CShart.targets in /Library/Frameworks/Mono.framework/Versions/3.2.6/lib/mono/xbuild/Microsoft/Portable/v4.5
 to:

<!--Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
	<Import Project="$(MSBuildExtensionsPath)\Microsoft.Portable.CSharp.Targets" />    
</Project-->
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
        <PropertyGroup>
                <AvailablePlatforms>Any CPU</AvailablePlatforms>

                <TargetPlatformIdentifier>Portable</TargetPlatformIdentifier>
                <TargetFrameworkIdentifier>.NETPortable</TargetFrameworkIdentifier>
                <TargetFrameworkMonikerDisplayName>.NET Portable Subset</TargetFrameworkMonikerDisplayName>

                <AddAdditionalExplicitAssemblyReferences>false</AddAdditionalExplicitAssemblyReferences>
                <NoStdLib>true</NoStdLib>

                <ImplicitlyExpandTargetFramework Condition="'$(ImplicitlyExpandTargetFramework)' == '' ">true</ImplicitlyExpandTargetFramework> 
        </PropertyGroup>

        <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.Targets" />

        <PropertyGroup>
                <ResolveReferencesDependsOn>
                        $(ResolveReferencesDependsOn);
                        ImplicitlyExpandTargetFramework;
                </ResolveReferencesDependsOn>

                <ImplicitlyExpandTargetFrameworkDependsOn>
                        $(ImplicitlyExpandTargetFrameworkDependsOn);
                        GetReferenceAssemblyPaths
                </ImplicitlyExpandTargetFrameworkDependsOn>
        </PropertyGroup>

        <Target Name="ImplicitlyExpandTargetFramework"
                DependsOnTargets="$(ImplicitlyExpandTargetFrameworkDependsOn)">

                <ItemGroup>
                        <ReferenceAssemblyPaths Include="$(_TargetFrameworkDirectories)"/>
                        <ReferencePath Include="%(ReferenceAssemblyPaths.Identity)\*.dll">
                                <CopyLocal>false</CopyLocal>
                                <ResolvedFrom>ImplicitlyExpandTargetFramework</ResolvedFrom>
                                <IsSystemReference>True</IsSystemReference>
                        </ReferencePath>
                </ItemGroup>
        </Target>
</Project>

2. Update .Shared.csproj to:

	<Project ToolVersion="4.0" ... />

3. Update .nuget/nuget.targets with:

-        <PackagesProjectConfig>packages.$(MSBuildProjectName.Replace(' ', '_')).config</PackagesProjectConfig>
+       <PackagesProjectConfig Condition=" '$(OS)' == 'Windows_NT'">$(MSBuildProjectDirectory)\packages.$(MSBuildProjectName.Replace(' ', '_')).config</PackagesProjectConfig>
+       <PackagesProjectConfig Condition=" '$(OS)' != 'Windows_NT'">$(MSBuildProjectDirectory)\packages.$(MSBuildProjectName).config</PackagesProjectConfig>    
	
-    <Choose>
-        <When Condition="Exists('$(PackagesProjectConfig)')">
-            <PropertyGroup>
-                <PackagesConfig>$(PackagesProjectConfig)</PackagesConfig>
-            </PropertyGroup>
-        </When>
-        <When Condition="Exists('packages.config')">
-            <PropertyGroup>
-                <PackagesConfig>packages.config</PackagesConfig>
-            </PropertyGroup>
-        </When>
-    </Choose>
+    <PropertyGroup>
+        <PackagesConfig Condition="Exists('$(PackagesProjectConfig)')">$(PackagesProjectConfig)</PackagesConfig>
+        <PackagesConfig Condition="Exists('$(MSBuildProjectDirectory)\packages.config')">$(MSBuildProjectDirectory)\packages.config</PackagesConfig>
+    </PropertyGroup>


At this point you should have your .Shared project building.

4. Repeat step 2. for every PCL project you want to build.

5. Add all transitive dependecies to iOSTab project.
	- NewtonJsoft for one.