diff --git a/examples/ios/.gn b/examples/ios/.gn
index e5b6d4a..fc31273 100644
--- a/examples/ios/.gn
+++ b/examples/ios/.gn
@@ -1,2 +1,6 @@
 # The location of the build configuration file.
 buildconfig = "//build/BUILDCONFIG.gn"
+
+# The build script are using `python3` which is the only version of
+# python installed by default on macOS Monterey and above.
+script_executable = "python3"
diff --git a/examples/ios/build/BUILD.gn b/examples/ios/build/BUILD.gn
index b6bb6de..e543493 100644
--- a/examples/ios/build/BUILD.gn
+++ b/examples/ios/build/BUILD.gn
@@ -77,6 +77,8 @@
                           [
                             "--target-cpu",
                             current_cpu,
+                            "--target-environment",
+                            target_environment,
                             "--deployment-target",
                             ios_deployment_target,
                           ],
diff --git a/examples/ios/build/BUILDCONFIG.gn b/examples/ios/build/BUILDCONFIG.gn
index 53ee3d9..ca6c49d 100644
--- a/examples/ios/build/BUILDCONFIG.gn
+++ b/examples/ios/build/BUILDCONFIG.gn
@@ -15,6 +15,16 @@
   current_os = target_os
 }
 
+declare_args() {
+  # Control which platform the build is targeting. Valid values are
+  # "simulator" or "device".
+  target_environment = "simulator"
+}
+
+assert(
+    target_environment == "simulator" || target_environment == "device",
+    "Only supported values for target_environment are 'simulator' and 'device'")
+
 # All binary targets will get this list of configs by default.
 _shared_binary_target_configs = [ "//build:compiler" ]
 
diff --git a/examples/ios/build/config/ios/scripts/find_app_identifier_prefix.py b/examples/ios/build/config/ios/scripts/find_app_identifier_prefix.py
index cf38b10..9e1dfbc 100644
--- a/examples/ios/build/config/ios/scripts/find_app_identifier_prefix.py
+++ b/examples/ios/build/config/ios/scripts/find_app_identifier_prefix.py
@@ -21,7 +21,7 @@
 
   def __init__(self, mobileprovision_path):
     self._path = mobileprovision_path
-    self._data = plistlib.readPlistFromString(
+    self._data = plistlib.loads(
         subprocess.check_output(
             ['security', 'cms', '-D', '-i', mobileprovision_path]))
 
diff --git a/examples/ios/build/config/ios/scripts/merge_plist.py b/examples/ios/build/config/ios/scripts/merge_plist.py
index 452cf53..f13ce00 100644
--- a/examples/ios/build/config/ios/scripts/merge_plist.py
+++ b/examples/ios/build/config/ios/scripts/merge_plist.py
@@ -18,11 +18,15 @@
 VARIABLE_PATTERN = re.compile(r'\$\(([^)]*)\)')
 
 
+def GetCommandOutput(command):
+  """Returns the output of `command` as a string."""
+  return subprocess.check_output(command, encoding='utf-8')
+
+
 def LoadPlist(plist_path):
   """Loads Apple Property List file at |plist_path|."""
   return json.loads(
-      subprocess.check_output(
-          ['plutil', '-convert', 'json', '-o', '-', plist_path]))
+      GetCommandOutput(['plutil', '-convert', 'json', '-o', '-', plist_path]))
 
 
 def SavePlist(plist_path, content, format):
@@ -30,7 +34,7 @@
   proc = subprocess.Popen(
       ['plutil', '-convert', format, '-o', plist_path, '-'],
       stdin=subprocess.PIPE)
-  output, _ = proc.communicate(json.dumps(content))
+  output, _ = proc.communicate(json.dumps(content).encode('utf-8'))
   if proc.returncode:
     raise subprocess.CalledProcessError(
         proc.returncode,
@@ -76,7 +80,7 @@
   if isinstance(plist, list):
     return [ PerformSubstitutions(item, substitutions) for item in plist ]
 
-  if isinstance(plist, (str, unicode)):
+  if isinstance(plist, str):
     result = plist
     while True:
       match = VARIABLE_PATTERN.search(result)
diff --git a/examples/ios/build/config/ios/scripts/sdk_info.py b/examples/ios/build/config/ios/scripts/sdk_info.py
index 831a3ed..c8f55cb 100644
--- a/examples/ios/build/config/ios/scripts/sdk_info.py
+++ b/examples/ios/build/config/ios/scripts/sdk_info.py
@@ -16,6 +16,11 @@
 XCODE_BUILD_PATTERN = re.compile(r'Build version (.*)')
 
 
+def GetCommandOutput(command):
+  """Returns the output of `command` as a string."""
+  return subprocess.check_output(command, encoding='utf-8')
+
+
 def GetAppleCpuName(target_cpu):
   """Returns the name of the |target_cpu| using Apple's convention."""
   return {
@@ -25,36 +30,31 @@
   }.get(target_cpu, target_cpu)
 
 
-def IsSimulator(target_cpu):
-  """Returns whether the |target_cpu| corresponds to a simulator build."""
-  return not target_cpu.startswith('arm')
+def GetPlatform(target_environment):
+  """Returns the platform for |target_environment|."""
+  return {
+      'simulator': 'iphonesimulator',
+      'device': 'iphoneos'
+  }[target_environment]
 
 
-def GetPlatform(target_cpu):
-  """Returns the platform for the |target_cpu|."""
-  if IsSimulator(target_cpu):
-    return 'iphonesimulator'
-  else:
-    return 'iphoneos'
-
-
-def GetPlaformDisplayName(target_cpu):
-  """Returns the platform display name for the |target_cpu|."""
-  if IsSimulator(target_cpu):
-    return 'iPhoneSimulator'
-  else:
-    return 'iPhoneOS'
+def GetPlaformDisplayName(target_environment):
+  """Returns the platform display name for |target_environment|."""
+  return {
+      'simulator': 'iPhoneSimulator',
+      'device': 'iPhoneOS'
+  }[target_environment]
 
 
 def ExtractOSVersion():
   """Extract the version of macOS of the current machine."""
-  return subprocess.check_output(['sw_vers', '-buildVersion']).strip()
+  return GetCommandOutput(['sw_vers', '-buildVersion']).strip()
 
 
 def ExtractXcodeInfo():
   """Extract Xcode version and build version."""
   version, build = None, None
-  for line in subprocess.check_output(['xcodebuild', '-version']).splitlines():
+  for line in GetCommandOutput(['xcodebuild', '-version']).splitlines():
     match = XCODE_VERSION_PATTERN.search(line)
     if match:
       major, minor = match.group(1), match.group(2)
@@ -72,23 +72,22 @@
 
 def ExtractSDKInfo(info, sdk):
   """Extract information about the SDK."""
-  return subprocess.check_output(
-      ['xcrun', '--sdk', sdk, '--show-sdk-' + info]).strip()
+  return GetCommandOutput(['xcrun', '--sdk', sdk, '--show-sdk-' + info]).strip()
 
 
 def GetDeveloperDir():
   """Returns the developer dir."""
-  return subprocess.check_output(['xcode-select', '-print-path']).strip()
+  return GetCommandOutput(['xcode-select', '-print-path']).strip()
 
 
-def GetSDKInfoForCpu(target_cpu, sdk_version, deployment_target):
+def GetSDKInfoForCpu(target_cpu, environment, sdk_version, deployment_target):
   """Returns a dictionary with information about the SDK."""
-  platform = GetPlatform(target_cpu)
+  platform = GetPlatform(environment)
   sdk_version = sdk_version or ExtractSDKInfo('version', platform)
   deployment_target = deployment_target or sdk_version
 
   target = target_cpu + '-apple-ios' + deployment_target
-  if IsSimulator(target_cpu):
+  if environment == 'simulator':
     target = target + '-simulator'
 
   xcode_version, xcode_build = ExtractXcodeInfo()
@@ -96,10 +95,10 @@
 
   sdk_info = {}
   sdk_info['compiler'] = 'com.apple.compilers.llvm.clang.1_0'
-  sdk_info['is_simulator'] = IsSimulator(target_cpu)
+  sdk_info['is_simulator'] = environment == 'simulator'
   sdk_info['macos_build'] = ExtractOSVersion()
   sdk_info['platform'] = platform
-  sdk_info['platform_name'] = GetPlaformDisplayName(target_cpu)
+  sdk_info['platform_name'] = GetPlaformDisplayName(environment)
   sdk_info['sdk'] = effective_sdk
   sdk_info['sdk_build'] = ExtractSDKInfo('build-version', effective_sdk)
   sdk_info['sdk_path'] = ExtractSDKInfo('path', effective_sdk)
@@ -124,6 +123,12 @@
       choices=('x86', 'x64', 'arm', 'arm64'),
       help='target cpu')
   parser.add_argument(
+      '-e',
+      '--target-environment',
+      default='simulator',
+      choices=('simulator', 'device'),
+      help='target environment')
+  parser.add_argument(
       '-s', '--sdk-version',
       help='version of the sdk')
   parser.add_argument(
@@ -140,9 +145,8 @@
   args = ParseArgs(argv)
 
   sdk_info = GetSDKInfoForCpu(
-      GetAppleCpuName(args.target_cpu),
-      args.sdk_version,
-      args.deployment_target)
+      GetAppleCpuName(args.target_cpu), args.target_environment,
+      args.sdk_version, args.deployment_target)
 
   if args.output == '-':
     sys.stdout.write(json.dumps(sdk_info))
diff --git a/examples/ios/build/config/ios/sdk_info.gni b/examples/ios/build/config/ios/sdk_info.gni
index 90b8631..c800253 100644
--- a/examples/ios/build/config/ios/sdk_info.gni
+++ b/examples/ios/build/config/ios/sdk_info.gni
@@ -8,6 +8,8 @@
                        [
                          "--target-cpu",
                          current_cpu,
+                         "--target-environment",
+                         target_environment,
                          "--deployment-target",
                          ios_deployment_target,
                        ],
diff --git a/examples/ios/build/config/ios/templates/ios_binary_bundle.gni b/examples/ios/build/config/ios/templates/ios_binary_bundle.gni
index 1a3d629..43ec355 100644
--- a/examples/ios/build/config/ios/templates/ios_binary_bundle.gni
+++ b/examples/ios/build/config/ios/templates/ios_binary_bundle.gni
@@ -117,5 +117,11 @@
     bundle_contents_dir = bundle_root_dir
     bundle_executable_dir = bundle_contents_dir
     bundle_resources_dir = bundle_contents_dir
+
+    xcode_extra_attributes = {
+      CODE_SIGN_IDENTITY = ""
+      CODE_SIGNING_REQUIRED = "NO"
+      CODE_SIGNING_ALLOWED = "NO"
+    }
   }
 }
diff --git a/examples/ios/build/toolchain/ios/BUILD.gn b/examples/ios/build/toolchain/ios/BUILD.gn
index 12d246b..b779720 100644
--- a/examples/ios/build/toolchain/ios/BUILD.gn
+++ b/examples/ios/build/toolchain/ios/BUILD.gn
@@ -23,6 +23,8 @@
                             [
                               "--target-cpu",
                               current_cpu,
+                              "--target-environment",
+                              target_environment,
                               "--deployment-target",
                               ios_deployment_target,
                             ],