Find the mono binary on OSX 10.11.

It is not in $PATH anymore if System Integrity Protection is on.

Author: rolfbjarne

.nuget/NuGet.targets

@@ -35,6 +35,8 @@
         <!-- We need to launch nuget.exe with the mono command if we're not on windows -->
         <NuGetToolsPath>$(SolutionDir).nuget</NuGetToolsPath>
         <PackagesConfig>packages.config</PackagesConfig>
+        <MonoPath Condition="'$(MonoPath)' == '' And Exists('/Library/Frameworks/Mono.framework/Commands/mono')">/Library/Frameworks/Mono.framework/Commands/mono</MonoPath>
+        <MonoPath Condition="'$(MonoPath)' == ''">mono</MonoPath>
     </PropertyGroup>
 
     <PropertyGroup>
@@ -43,7 +45,7 @@
         <PackageSources Condition=" $(PackageSources) == '' ">@(PackageSource)</PackageSources>
 
         <NuGetCommand Condition=" '$(OS)' == 'Windows_NT'">"$(NuGetExePath)"</NuGetCommand>
-        <NuGetCommand Condition=" '$(OS)' != 'Windows_NT' ">mono --runtime=v4.0.30319 $(NuGetExePath)</NuGetCommand>
+        <NuGetCommand Condition=" '$(OS)' != 'Windows_NT' ">$(MonoPath) --runtime=v4.0.30319 $(NuGetExePath)</NuGetCommand>
 
         <PackageOutputDir Condition="$(PackageOutputDir) == ''">$(TargetDir.Trim('\\'))</PackageOutputDir>
 

FSharp.Core.Nuget/.nuget/NuGet.targets

@@ -35,6 +35,8 @@
         <!-- We need to launch nuget.exe with the mono command if we're not on windows -->
         <NuGetToolsPath>$(SolutionDir).nuget</NuGetToolsPath>
         <PackagesConfig>packages.config</PackagesConfig>
+        <MonoPath Condition="'$(MonoPath)' == '' And Exists('/Library/Frameworks/Mono.framework/Commands/mono')">/Library/Frameworks/Mono.framework/Commands/mono</MonoPath>
+        <MonoPath Condition="'$(MonoPath)' == ''">mono</MonoPath>
     </PropertyGroup>
 
     <PropertyGroup>
@@ -43,7 +45,7 @@
         <PackageSources Condition=" $(PackageSources) == '' ">@(PackageSource)</PackageSources>
 
         <NuGetCommand Condition=" '$(OS)' == 'Windows_NT'">"$(NuGetExePath)"</NuGetCommand>
-        <NuGetCommand Condition=" '$(OS)' != 'Windows_NT' ">mono --runtime=v4.0.30319 $(NuGetExePath)</NuGetCommand>
+        <NuGetCommand Condition=" '$(OS)' != 'Windows_NT' ">$(MonoPath) --runtime=v4.0.30319 $(NuGetExePath)</NuGetCommand>
 
         <PackageOutputDir Condition="$(PackageOutputDir) == ''">$(TargetDir.Trim('\\'))</PackageOutputDir>