[Git] Disable agent support on El Capitan+.

The socket variable is getting reset and there's no valid error path we
can check.

1 files changed, 7 insertions, 1 deletions

diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git/MonoDevelop.VersionControl.Git/GitCredentials.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git/MonoDevelop.VersionControl.Git/GitCredentials.cs
index f6aaa17013..9c9dfde998 100644
--- a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git/MonoDevelop.VersionControl.Git/GitCredentials.cs
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git/MonoDevelop.VersionControl.Git/GitCredentials.cs
@@ -78,6 +78,12 @@ namespace MonoDevelop.VersionControl.Git
 			}
 		}
 
+		static bool SshAgentSupported (GitCredentialsState state)
+		{
+			return !state.AgentUsed &&
+				(Platform.IsLinux || (Platform.IsMac && MacSystemInformation.OsVersion >= MacSystemInformation.ElCapitan));
+		}
+
 		public static Credentials TryGet (string url, string userFromUrl, SupportedCredentialTypes types, GitCredentialsType type)
 		{
 			bool result = true;
@@ -108,7 +114,7 @@ namespace MonoDevelop.VersionControl.Git
 				cred = new UsernamePasswordCredentials ();
 			else {
 				// Try ssh-agent on Linux.
-				if (!Platform.IsWindows && !state.AgentUsed) {
+				if (SshAgentSupported (state)) {
 					bool agentUsable;
 					if (!state.AgentForUrl.TryGetValue (url, out agentUsable))
 						state.AgentForUrl [url] = agentUsable = true;