Replaced MacOS with macOS

Tests/check_imaging_leaks.py

@@ -9,7 +9,7 @@ min_iterations = 100
 max_iterations = 10000
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestImagingLeaks(PillowTestCase):
 
     def _get_mem_usage(self):

Tests/check_j2k_leaks.py

@@ -11,7 +11,7 @@ codecs = dir(Image.core)
 test_file = "Tests/images/rgb_trns_ycbc.jp2"
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestJpegLeaks(PillowTestCase):
     def setUp(self):
         if "jpeg2k_encoder" not in codecs or "jpeg2k_decoder" not in codecs:

Tests/check_jpeg_leaks.py

@@ -15,7 +15,7 @@ NOSE_PROCESSES=0 NOSE_TIMEOUT=600 valgrind --tool=massif \
 """
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestJpegLeaks(PillowTestCase):
 
     """

Tests/helper.py

@@ -227,7 +227,7 @@ class PillowTestCase(unittest.TestCase):
         raise IOError()
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class PillowLeakTestCase(PillowTestCase):
     # requires unix/osx
     iterations = 100  # count

Tests/test_file_icns.py

@@ -22,7 +22,7 @@ class TestFileIcns(PillowTestCase):
         self.assertEqual(im.size, (1024, 1024))
         self.assertEqual(im.format, "ICNS")
 
-    @unittest.skipIf(sys.platform != 'darwin', "requires MacOS")
+    @unittest.skipIf(sys.platform != 'darwin', "requires macOS")
     def test_save(self):
         im = Image.open(TEST_FILE)
 
@@ -35,7 +35,7 @@ class TestFileIcns(PillowTestCase):
         self.assertEqual(reread.size, (1024, 1024))
         self.assertEqual(reread.format, "ICNS")
 
-    @unittest.skipIf(sys.platform != 'darwin', "requires MacOS")
+    @unittest.skipIf(sys.platform != 'darwin', "requires macOS")
     def test_save_append_images(self):
         im = Image.open(TEST_FILE)
 

Tests/test_file_png.py

@@ -540,7 +540,7 @@ class TestFilePng(PillowTestCase):
         self.assertEqual(len(chunks), 3)
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestTruncatedPngPLeaks(PillowLeakTestCase):
     mem_limit = 2*1024  # max increase in K
     iterations = 100  # Leak is 56k/iteration, this will leak 5.6megs

Tests/test_font_leaks.py

@@ -4,7 +4,7 @@ import sys
 from PIL import Image, features, ImageDraw, ImageFont
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestTTypeFontLeak(PillowLeakTestCase):
     # fails at iteration 3 in master
     iterations = 10

Tests/test_imagefont.py

@@ -437,7 +437,7 @@ class TestImageFont(PillowTestCase):
                 self.assertEqual(('FreeMono', 'Regular'), name)
 
     @unittest.skipIf(sys.platform.startswith('win32'),
-                     "requires Unix or MacOS")
+                     "requires Unix or macOS")
     def test_find_linux_font(self):
         # A lot of mocking here - this is more for hitting code and
         # catching syntax like errors
@@ -471,7 +471,7 @@ class TestImageFont(PillowTestCase):
                         font_directory+'/Duplicate.ttf', 'Duplicate')
 
     @unittest.skipIf(sys.platform.startswith('win32'),
-                     "requires Unix or MacOS")
+                     "requires Unix or macOS")
     def test_find_macos_font(self):
         # Like the linux test, more cover hitting code rather than testing
         # correctness.

Tests/test_shell_injection.py

@@ -18,7 +18,7 @@ test_filenames = (
 )
 
 
-@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
+@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestShellInjection(PillowTestCase):
 
     def assert_save_filename_check(self, src_img, save_func):