diff --git a/build/config/mac/sdk_info.py b/build/config/mac/sdk_info.py
index 6396c0fe490274619bba4421d17cb93b23b94c2d..3751ee5a67315a21e0d79ab03ab58b7da3efc10a 100755
--- a/build/config/mac/sdk_info.py
+++ b/build/config/mac/sdk_info.py
@@ -17,7 +17,7 @@ import sys
 
 
 def SplitVersion(version):
-  """Splits the Xcode version to 3 values.
+    """Splits the Xcode version to 3 values.
 
   >>> list(SplitVersion('8.2.1.1'))
   ['8', '2', '1']
@@ -26,14 +26,14 @@ def SplitVersion(version):
   >>> list(SplitVersion('10.0'))
   ['10', '0', '0']
   """
-  if isinstance(version, bytes):
-    version = version.decode()
-  version = version.split('.')
-  return itertools.islice(itertools.chain(version, itertools.repeat('0')), 0, 3)
+    if isinstance(version, bytes):
+        version = version.decode()
+        version = version.split('.')
+    return itertools.islice(itertools.chain(version, itertools.repeat('0')), 0, 3)
 
 
 def FormatVersion(version):
-  """Converts Xcode version to a format required for DTXcode in Info.plist
+    """Converts Xcode version to a format required for DTXcode in Info.plist
 
   >>> FormatVersion('8.2.1')
   '0821'
@@ -42,63 +42,63 @@ def FormatVersion(version):
   >>> FormatVersion('10.0')
   '1000'
   """
-  major, minor, patch = SplitVersion(version)
-  return ('%2s%s%s' % (major, minor, patch)).replace(' ', '0')
+    major, minor, patch = SplitVersion(version)
+    return ('%2s%s%s' % (major, minor, patch)).replace(' ', '0')
 
 
 def FillXcodeVersion(settings):
-  """Fills the Xcode version and build number into |settings|."""
-  lines = subprocess.check_output(['xcodebuild', '-version']).splitlines()
-  settings['xcode_version'] = FormatVersion(lines[0].split()[-1])
-  settings['xcode_version_int'] = int(settings['xcode_version'], 10)
-  settings['xcode_build'] = lines[-1].split()[-1]
+    """Fills the Xcode version and build number into |settings|."""
+    lines = subprocess.check_output(['xcodebuild', '-version']).splitlines()
+    settings['xcode_version'] = FormatVersion(lines[0].split()[-1])
+    settings['xcode_version_int'] = int(settings['xcode_version'], 10)
+    settings['xcode_build'] = lines[-1].split()[-1]
 
 
 def FillMachineOSBuild(settings):
-  """Fills OS build number into |settings|."""
-  settings['machine_os_build'] = subprocess.check_output(
+    """Fills OS build number into |settings|."""
+    settings['machine_os_build'] = subprocess.check_output(
       ['sw_vers', '-buildVersion']).strip()
 
 
 def FillSDKPathAndVersion(settings, platform, xcode_version):
-  """Fills the SDK path and version for |platform| into |settings|."""
-  settings['sdk_path'] = subprocess.check_output([
+    """Fills the SDK path and version for |platform| into |settings|."""
+    settings['sdk_path'] = subprocess.check_output([
       'xcrun', '-sdk', platform, '--show-sdk-path']).strip()
-  settings['sdk_version'] = subprocess.check_output([
+    settings['sdk_version'] = subprocess.check_output([
       'xcrun', '-sdk', platform, '--show-sdk-version']).strip()
-  settings['sdk_platform_path'] = subprocess.check_output([
+    settings['sdk_platform_path'] = subprocess.check_output([
       'xcrun', '-sdk', platform, '--show-sdk-platform-path']).strip()
-  if xcode_version >= '0720':
+    if xcode_version >= '0720':
     settings['sdk_build'] = subprocess.check_output([
         'xcrun', '-sdk', platform, '--show-sdk-build-version']).strip()
-  else:
+    else:
     settings['sdk_build'] = settings['sdk_version']
 
 
 if __name__ == '__main__':
-  doctest.testmod()
+    doctest.testmod()
 
-  parser = argparse.ArgumentParser()
-  parser.add_argument("--developer_dir", required=False)
-  args, unknownargs = parser.parse_known_args()
-  if args.developer_dir:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--developer_dir", required=False)
+    args, unknownargs = parser.parse_known_args()
+    if args.developer_dir:
     os.environ['DEVELOPER_DIR'] = args.developer_dir
 
-  if len(unknownargs) != 1:
-    sys.stderr.write(
+    if len(unknownargs) != 1:
+        sys.stderr.write(
         'usage: %s [iphoneos|iphonesimulator|macosx]\n' %
         os.path.basename(sys.argv[0]))
     sys.exit(1)
 
-  settings = {}
-  FillMachineOSBuild(settings)
-  FillXcodeVersion(settings)
-  FillSDKPathAndVersion(settings, unknownargs[0], settings['xcode_version'])
+    settings = {}
+    FillMachineOSBuild(settings)
+    FillXcodeVersion(settings)
+    FillSDKPathAndVersion(settings, unknownargs[0], settings['xcode_version'])
 
-  for key in sorted(settings):
+for key in sorted(settings):
     value = settings[key]
     if isinstance(value, bytes):
-      value = value.decode()
+        value = value.decode()
     if key != 'xcode_version_int':
         value = '"%s"' % value
         print('%s=%s' % (key, value))