Merge pull request microsoft#178 from MicrosoftDocs/repo_sync_working…

…_branch

Confirm merge from repo_sync_working_branch to live to sync with https://github.com/microsoftdocs/live-share (branch master)

docs/troubleshooting.md

@@ -29,6 +29,7 @@ The following are troubleshooting tips related to installing Visual Studio Live
 
 | Tool | Problem | Resolution / Workaround |
 |------|---------|------------|
+|VS Code <strong>(macOS)</strong>| A warning appears telling you your <strong>macOS is not supported anymore by .NET Core/strong>| This warning appears is due to a recent [update made by .NET Core](https://docs.microsoft.com/en-us/dotnet/core/install/dependencies?tabs=netcore31&pivots=os-macos) that no longer supports any versions lower than <strong>High Sierra (10.13+).</strong> To enable the Live Share extension, please update you OS.
 | VS | The extension installer <strong>cannot find a version of Visual Studio</strong> to use when trying to install the Visual Studio Live Share extension. | Visual Studio Live Share requires **Visual Studio 2017 version 15.6** or higher for both hosts and guests. Install the latest stable [update of Visual Studio 2017](https://visualstudio.com/vs/) and retry.|
 | VS Code | An error appears when trying to use Visual Studio Live Share with VS Code on macOS <strong>El Capitan or below</strong>. | Visual Studio Live Share's OS support is dependant on .NET Core which currently [only supports macOS Sierra and up](https://github.com/dotnet/core/blob/master/release-notes/2.0/2.0-supported-os.md). |
 | VS Code | A "**Dependencies could not be installed**" error appears the while extension is **finishing installation** on first start or you get errors about **missing or already present files**. | Verify you are on a **good network connection**. If you are, you could be running into a **proxy or firewall** issue. See [connectivity troubleshooting](#connectivity). <br /><br />|