Use fancy mac symbols for key names

Resources/Locale/en-US/input.ftl

@@ -2,6 +2,7 @@ input-key-Escape = Escape
 input-key-Control = Control
 input-key-Shift = Shift
 input-key-Alt = Alt
+input-key-Alt-mac = ⌥
 input-key-Menu = Menu
 input-key-F1 = F1
 input-key-F2 = F2
@@ -70,8 +71,8 @@ input-key-MouseButton9 = Mouse 9
 
 input-key-LSystem-win = Left Win
 input-key-RSystem-win = Right Win
-input-key-LSystem-mac = Left Cmd
-input-key-RSystem-mac = Right Cmd
+input-key-LSystem-mac = Left ⌘
+input-key-RSystem-mac = Right ⌘
 input-key-LSystem-linux = Left Meta
 input-key-RSystem-linux = Right Meta
 

Robust.Client/Input/InputDevices.cs

@@ -197,6 +197,13 @@ namespace Robust.Client.Input
                     locId += "-linux";
             }
 
+#if MACOS
+            if (key == Key.Alt)
+            {
+                locId += "-mac";
+            }
+#endif
+
             if (loc.TryGetString(locId, out var name))
                 return name;