--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1093,17 +1093,17 @@ pref("print.print_unwriteable_margin_bot
 // This is used by both Printing and Print Preview
 // Units are in 1/100ths of an inch.
 pref("print.print_edge_top", 0);
 pref("print.print_edge_left", 0);
 pref("print.print_edge_right", 0);
 pref("print.print_edge_bottom", 0);
 
 // Print via the parent process. This is only used when e10s is enabled.
-#if defined(XP_WIN)
+#if defined(XP_WIN) || defined(XP_MACOSX)
 pref("print.print_via_parent", true);
 #else
 pref("print.print_via_parent", false);
 #endif
 
 // Pref used by the spellchecker extension to control the
 // maximum number of misspelled words that will be underlined
 // in a document.