Issue IOS simulator - xamarin

Question

I upgraded VS 2015 CE with Update 2 by installing Xamarin, but I have a problem with IOS simulators, because after you successfully connected the Mac Agent, the list of available devices (iPhoneSimulator) remains empty. The operating system (Mac) installed on a VM's OS X El capitan 10.11.4. I tried to start the test project by Xamarin studio on Mac and it all works. Both versions of Xamrain (Pc and Mac) are updated to the latest version. How do I fix it? Thank you
Edit based on comments:
#Milev Pavlov Yes, XCode version is 7.3(7D175) #Alan Clark Yes I have Mac OS X in a VM. The version info:
Microsoft Visual Studio Community 2015 Version 14.0.25123.00 Update 2
Microsoft .NET Framework Version 4.6.01038
Installed Version: Community
Visual Basic 2015 00322-20000-00000-AA395 Microsoft Visual Basic 2015
Visual C# 2015 00322-20000-00000-AA395 Microsoft Visual C# 2015
Visual C++ 2015 00322-20000-00000-AA395 Microsoft Visual C++ 2015
Windows Phone SDK 8.0 - ENU 00322-20000-00000-AA395 Windows Phone SDK
8.0 - ENU
Application Insights Tools for Visual Studio Package 5.2.60328.3
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 2015 (RC1 Update 1) 14.1.20203.0 ASP.NET and Web
Tools 2015 (RC1 Update 1)
ASP.NET Web Frameworks and Tools 2012.2 4.1.41102.0 For additional
information, visit
ASP.NET Web Frameworks and Tools 2013 5.2.40314.0 For additional
information, visit
Azure App Service Tools v2.8.2 14.0.20201.0 Azure App Service Tools
v2.8.2
Clang with Microsoft CodeGen 14.0.25115 Clang with Microsoft CodeGen
Common Azure Tools 1.7 Provides common services for use by Azure
Mobile Services and Microsoft Azure Tools.
DataFactoryProject 1.0 Microsoft Data Factory Package
GitHub.VisualStudio 1.0 A Visual Studio Extension that brings the
GitHub Flow into Visual Studio.
JavaScript Language Service 2.0 JavaScript Language Service
JavaScript Project System 2.0 JavaScript Project System
KofePackagePackage Extension 1.0 KofePackagePackage Visual Studio
Extension Detailed Info
Microsoft Azure Data Factory Node Node 1.0 Azure Data Factory
extension for Visual Studio Server Explorer.
Microsoft Azure HDInsight HQL Service 2.0.2900.0 Language service for
Hive query
Microsoft Azure HDInsight Tools for Visual Studio 2.0.2900.0 An
integrated development environment for HDInsight application
development.
Microsoft Azure Mobile Services Tools 1.4 Microsoft Azure Mobile
Services Tools
Microsoft Azure Tools 2.8 Microsoft Azure Tools for Microsoft Visual
Studio 2015 - v2.8.40211.2
Microsoft MI-Based Debugger 1.0 Provides support for connecting Visual
Studio to MI compatible debuggers
NuGet Package Manager 3.4.1 NuGet Package Manager in Visual Studio.
For more information about NuGet, visit
PreEmptive Analytics Visualizer 1.2 Microsoft Visual Studio extension
to visualize aggregated summaries from the PreEmptive Analytics
product.
SQL Server Data Tools 14.0.60311.1 Microsoft SQL Server Data Tools
TypeScript 1.8.29.0 TypeScript tools for Visual Studio
Visual C++ for Cross Platform Mobile Development (Android)
14.0.25116.00 Visual C++ for Cross Platform Mobile Development (Android)
Visual C++ for Cross Platform Mobile Development (iOS) 14.0.25116.00
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Visual Studio Tools for Apache Cordova Update 8 Visual Studio Tools
for Apache Cordova
Visual Studio Tools for Universal Windows Apps 14.0.25123.00 The
Visual Studio Tools for Universal Windows apps allow you to build a
single universal app experience that can reach every device running
Windows 10: phone, tablet, PC, and more. It includes the Microsoft
Windows 10 Software Development Kit.
Xamarin 4.0.3.214 (0dd817c) Visual Studio extension to enable
development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 6.0.3.5 (a94a03b) Visual Studio plugin to enable
development for Xamarin.Android.
Xamarin.iOS 9.6.1.8 (3a25bf1) Visual Studio extension to enable
development for Xamarin.iOS.

Answer 1

On the Mac, open a terminal and enter:
ps -eax | grep Xamarin
Then
kill 12345
Where 12345 is replaced by the pid of the process "IDB".
Then wait a few seconds.
If the list of emulators still does not display try again this trick.
If it still does not display :
close vs,
make sure there is no process listed on the Mac by the above command, kill them if needed.
Restart vs.
should be ok.

Answer 2

Please keep in mind remote simulator is only available on enterprise
https://developer.xamarin.com/guides/cross-platform/windows/ios-simulator/
Remoted iOS Simulator requires a Visual Studio Enterprise license

Answer 3

Are you suggesting that you have Mac OS X running in a VM? The only supported scenario is running a Windows VM within OS X, where Windows would be the virtualised environment. If this is how you do have your computer set up then please confirm your version information for both the Mac and PC, along with your Xamarin logs:
Version info:
Visual Studio
Help -> About Microsoft Visual Studio -> Copy Info [button]
Xamarin Studio in OS X
Xamarin Studio -> About Xamarin Studio -> Show Details -> Copy Information [button]
Logs:
In Visual Studio:
Help -> Xamarin -> Zip Logs
Xamarin for Mac logs:
You can select the "Go -> Go to Folder" menu item in Finder, and then copy and paste the path into the dialog.
~/Library/Logs/Xamarin-[MAJOR.MINOR]