Ctrl+A is handled differently on OSX than on Windows / Linux by wxWidgets

src/slic3r/GUI/GLCanvas3D.cpp

@@ -5107,10 +5107,9 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
 //#endif /* __APPLE__ */
     if ((evt.GetModifiers() & ctrlMask) != 0) {
         switch (keyCode) {
-#ifndef __APPLE__
-        // Even though Control+A is captured by the accelerator on OSX/wxWidgets in Slic3r, it works in text edit lines.
+        case 'a':
+        case 'A':
         case WXK_CONTROL_A: post_event(SimpleEvent(EVT_GLCANVAS_SELECT_ALL)); break;
-#endif /* __APPLE__ */
 #ifdef __APPLE__
         case WXK_BACK: // the low cost Apple solutions are not equipped with a Delete key, use Backspace instead.
 #endif /* __APPLE__ */