diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index 287c063..dbf59b1 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -667,7 +667,11 @@
 		try:
 			# Disable event scanning except for Command-Period
 			import MacOS
-			MacOS.EnableAppswitch(0)
+			try:
+				MacOS.SchedParams(1, 0)
+			except AttributeError:
+				# pre-1.5, use old routine
+				MacOS.EnableAppswitch(0)
 		except ImportError:
 			pass
 		else:
diff --git a/Lib/test/test_strftime.py b/Lib/test/test_strftime.py
index 0c8f41f..e97c011 100755
--- a/Lib/test/test_strftime.py
+++ b/Lib/test/test_strftime.py
@@ -28,8 +28,11 @@
 
     jan1 = time.localtime(time.mktime((now[0], 1, 1) + (0,)*6))
 
-    if now[8]: tz = time.tzname[1]
-    else: tz = time.tzname[0]
+    try:
+	if now[8]: tz = time.tzname[1]
+	else: tz = time.tzname[0]
+    except AttributeError:
+    	tz = ''
 
     if now[3] > 12: clock12 = now[3] - 12
     elif now[3] > 0: clock12 = now[3]
@@ -66,7 +69,6 @@
 	 '%m/%d/%y %H:%M:%S'),
 	('%Y', '%d' % now[0], 'year with century'),
 	('%y', '%02d' % (now[0]%100), 'year without century'),
-	('%Z', tz, 'time zone name'),
 	('%%', '%', 'single percent sign'),
 	)
 
@@ -80,6 +82,7 @@
 	 'year without century rendered using fieldwidth'),
 	('%n', '\n', 'newline character'),
 	('%t', '\t', 'tab character'),
+	('%Z', tz, 'time zone name'),
 	)
 
     if verbose:
diff --git a/Lib/tkinter/Tkinter.py b/Lib/tkinter/Tkinter.py
index 287c063..dbf59b1 100755
--- a/Lib/tkinter/Tkinter.py
+++ b/Lib/tkinter/Tkinter.py
@@ -667,7 +667,11 @@
 		try:
 			# Disable event scanning except for Command-Period
 			import MacOS
-			MacOS.EnableAppswitch(0)
+			try:
+				MacOS.SchedParams(1, 0)
+			except AttributeError:
+				# pre-1.5, use old routine
+				MacOS.EnableAppswitch(0)
 		except ImportError:
 			pass
 		else: