diff --git a/src/auto/configure b/src/auto/configure
index f976f51..3d94de5 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -3843,7 +3843,9 @@
   fi
 
   if test "X$vi_cv_path_mzscheme_pfx" != "X"; then
-    if test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"; then
+    if test "x$MACOSX" = "xyes"; then
+      MZSCHEME_LIBS="-framework PLT_MzScheme"
+    elif test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"; then
       MZSCHEME_LIBS="${vi_cv_path_mzscheme_pfx}/lib/libmzscheme.a ${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"
     else
       MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme -lmzgc"
diff --git a/src/configure.in b/src/configure.in
index 254ca0da6..7514eb3 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -423,7 +423,9 @@
   fi
 
   if test "X$vi_cv_path_mzscheme_pfx" != "X"; then
-    if test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"; then
+    if test "x$MACOSX" = "xyes"; then
+      MZSCHEME_LIBS="-framework PLT_MzScheme"
+    elif test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"; then
       MZSCHEME_LIBS="${vi_cv_path_mzscheme_pfx}/lib/libmzscheme.a ${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"
     else
       MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme -lmzgc"
diff --git a/src/if_mzsch.c b/src/if_mzsch.c
index 1f13e83..9efb621 100644
--- a/src/if_mzsch.c
+++ b/src/if_mzsch.c
@@ -773,8 +773,7 @@
 #ifdef MZSCHEME_COLLECTS
     /* setup 'current-library-collection-paths' parameter */
     scheme_set_param(scheme_config, MZCONFIG_COLLECTION_PATHS,
-	    scheme_make_pair(scheme_make_string(MZSCHEME_COLLECTS),
-		scheme_null));
+	    scheme_build_list(0, scheme_make_string(MZSCHEME_COLLECTS)));
 #endif
 #ifdef HAVE_SANDBOX
     /* setup sandbox guards */
diff --git a/src/version.c b/src/version.c
index 05d09ca..b68beb0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -667,6 +667,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    15,
+/**/
     14,
 /**/
     13,