Index: /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIDefs.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIDefs.h	(revision 57952)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIDefs.h	(revision 57953)
@@ -102,4 +102,5 @@
     MacOSXRelease_Mavericks,
     MacOSXRelease_Yosemite,
+    MacOSXRelease_ElCapitan,
     MacOSXRelease_New,
 };
Index: /trunk/src/VBox/Frontends/VirtualBox/src/globals/VBoxGlobal.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/globals/VBoxGlobal.cpp	(revision 57952)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/globals/VBoxGlobal.cpp	(revision 57953)
@@ -331,4 +331,5 @@
         release[13] = MacOSXRelease_Mavericks;
         release[14] = MacOSXRelease_Yosemite;
+        release[15] = MacOSXRelease_ElCapitan;
 
         /* Cut the major release index of the string we have, s.a. 'man uname': */
Index: /trunk/src/VBox/Frontends/VirtualBox/src/main.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/main.cpp	(revision 57952)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/main.cpp	(revision 57953)
@@ -377,4 +377,5 @@
             case MacOSXRelease_Mavericks: QFont::insertSubstitution(".Lucida Grande UI", "Lucida Grande"); break;
             case MacOSXRelease_Yosemite:  QFont::insertSubstitution(".Helvetica Neue DeskInterface", "Helvetica Neue"); break;
+            case MacOSXRelease_ElCapitan: QFont::insertSubstitution(".SF NS Text", "Helvetica Neue"); break;
             default: break;
         }