diff --git a/PKHeX.WinForms/Program.cs b/PKHeX.WinForms/Program.cs
index 31ff979bd..139429716 100644
--- a/PKHeX.WinForms/Program.cs
+++ b/PKHeX.WinForms/Program.cs
@@ -29,16 +29,33 @@ private static void Main()
 
             try
             {
-                if (GetFrameworkVersion() >= 393295)
-                {
-                    StartPKHeX();
-                }
-                else
-                {
-                    // Todo: make this translatable
-                    MessageBox.Show(".NET Framework 4.6 needs to be installed for this version of PKHeX to run.", "PKHeX Error", MessageBoxButtons.OK, MessageBoxIcon.Stop);
-                    Process.Start(@"https://www.microsoft.com/download/details.aspx?id=48130");
-                }
+				if (IsOnWindows())
+				{
+					if (GetFrameworkVersion() >= 393295)
+					{
+						StartPKHeX();
+					}
+					else
+					{
+						// Todo: make this translatable
+						MessageBox.Show(".NET Framework 4.6 needs to be installed for this version of PKHeX to run.", "PKHeX Error", MessageBoxButtons.OK, MessageBoxIcon.Stop);
+						Process.Start(@"https://www.microsoft.com/download/details.aspx?id=48130");
+					}
+				}
+				else
+				{
+					//CLR Version 4.0.30319 is equivalent to .NET Framework version 4.6
+					if ((Environment.Version.CompareTo(Version.Parse("4.0.30319.42000"))) >= 0)
+					{
+						StartPKHeX();
+					}
+					else
+					{
+						MessageBox.Show("Your version of Mono needs to target the .NET Framework 4.6 or higher for this version of PKHeX to run.",
+										"PKHeX Error", MessageBoxButtons.OK, MessageBoxIcon.Stop);
+					}
+				}
+                
             }
             catch (FileNotFoundException ex)
             {
@@ -63,6 +80,16 @@ private static void StartPKHeX()
             Application.Run(new Main());
         }
 
+		public static bool IsOnWindows()
+		{
+			// 4 -> UNIX, 6 -> Mac OSX, 128 -> UNIX (old)
+			int p = (int)Environment.OSVersion.Platform;
+			if ((p == 4) || (p == 6) || (p == 128))
+				return false;
+			return true;
+		}
+
+
         public static int GetFrameworkVersion()
         {
             const string subkey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";