diff --git a/src/rpcclient/rpcclient/darwin/client.py b/src/rpcclient/rpcclient/darwin/client.py
index c162aba6..14464de7 100644
--- a/src/rpcclient/rpcclient/darwin/client.py
+++ b/src/rpcclient/rpcclient/darwin/client.py
@@ -9,6 +9,7 @@
 from rpcclient.darwin import objective_c_class
 from rpcclient.darwin.consts import kCFNumberSInt64Type, kCFNumberDoubleType
 from rpcclient.darwin.fs import DarwinFs
+from rpcclient.darwin.iokit import IOKit
 from rpcclient.darwin.media import DarwinMedia
 from rpcclient.darwin.network import DarwinNetwork
 from rpcclient.darwin.objective_c_symbol import ObjectiveCSymbol
@@ -56,6 +57,7 @@ def __init__(self, sock, sysname: str, hostname: str, port: int = None):
         self.processes = DarwinProcesses(self)
         self.media = DarwinMedia(self)
         self.network = DarwinNetwork(self)
+        self.iokit = IOKit(self)
 
     @property
     def modules(self) -> typing.List[str]:
@@ -85,7 +87,9 @@ def symbol(self, symbol: int):
         return DarwinSymbol.create(symbol, self)
 
     def cf(self, o: object):
-        if isinstance(o, DarwinSymbol):
+        if o is None:
+            return self.symbols.kCFNull[0]
+        elif isinstance(o, DarwinSymbol):
             # assuming it's already a cfobject
             return o
         elif isinstance(o, str):
diff --git a/src/rpcclient/rpcclient/darwin/iokit.py b/src/rpcclient/rpcclient/darwin/iokit.py
new file mode 100644
index 00000000..7b10119c
--- /dev/null
+++ b/src/rpcclient/rpcclient/darwin/iokit.py
@@ -0,0 +1,118 @@
+from typing import Mapping
+
+from rpcclient.exceptions import RpcClientException
+from rpcclient.allocated import Allocated
+
+
+class IOService(Allocated):
+    """ representation of a remote IOService """
+
+    def __init__(self, client, service):
+        super().__init__()
+        self._client = client
+        self._service = service
+
+    def set(self, properties: Mapping):
+        self._client.symbols.IORegistryEntrySetCFProperties(self._service, self._client.cf(properties))
+
+    def get(self, key: str):
+        return self._client.symbols.IORegistryEntryCreateCFProperty(self._service, self._client.cf(key), 0, 0).py
+
+    def _deallocate(self):
+        self._client.symbols.IOObjectRelease(self._service)
+
+
+class BacklightControlService(IOService):
+    @property
+    def display_parameters(self) -> Mapping:
+        return self.get('IODisplayParameters')
+
+    @property
+    def brightness(self) -> int:
+        return self.display_parameters['brightness']['value']
+
+    @brightness.setter
+    def brightness(self, value: int):
+        self.set({'EnableBacklight': bool(value)})
+        self.set({'brightness': value})
+
+
+class PowerSourceService(IOService):
+    @property
+    def battery_voltage(self) -> int:
+        return self.get('AppleRawBatteryVoltage')
+
+    @property
+    def charging(self) -> bool:
+        return self.get('IsCharging')
+
+    @charging.setter
+    def charging(self, value: bool):
+        self.set({'IsCharging': value, 'ExternalConnected': value})
+
+    @property
+    def external_connected(self) -> bool:
+        return self.get('ExternalConnected')
+
+    @external_connected.setter
+    def external_connected(self, value: bool):
+        self.set({'ExternalConnected': value})
+
+    @property
+    def current_capacity(self) -> int:
+        return self.get('CurrentCapacity')
+
+    @current_capacity.setter
+    def current_capacity(self, value: int):
+        self.set({'CurrentCapacity': value})
+
+    @property
+    def at_warn_level(self) -> bool:
+        return self.get('AtWarnLevel')
+
+    @at_warn_level.setter
+    def at_warn_level(self, value: bool):
+        self.set({'AtWarnLevel': value})
+
+    @property
+    def time_remaining(self) -> int:
+        return self.get('TimeRemaining')
+
+    @property
+    def temperature(self) -> int:
+        return self.get('Temperature')
+
+    @temperature.setter
+    def temperature(self, value: int):
+        self.set({'Temperature': value})
+
+
+class IOKit:
+    """ IORegistry utils """
+
+    def __init__(self, client):
+        """
+        :param rpcclient.darwin.client.DarwinClient client:
+        """
+        self._client = client
+
+    @property
+    def backlight_control(self) -> IOService:
+        return self.get_ioservice_by_property({'backlight-control': True}, cls=BacklightControlService)
+
+    @property
+    def power_source(self) -> IOService:
+        return self.get_ioservice_by_service_name('IOPMPowerSource', cls=PowerSourceService)
+
+    def get_ioservice_by_service_name(self, service_name: str, cls=IOService) -> IOService:
+        service = self._client.symbols.IOServiceGetMatchingService(0,
+                                                                   self._client.symbols.IOServiceMatching(service_name))
+        if not service:
+            raise RpcClientException(f'IOServiceGetMatchingService failed for: {service_name}')
+        return cls(self._client, service)
+
+    def get_ioservice_by_property(self, property_: Mapping, cls=IOService) -> IOService:
+        service = self._client.symbols.IOServiceGetMatchingService(0, self._client.cf({'IOPropertyMatch': property_}))
+        if not service:
+            raise RpcClientException(f'IOServiceGetMatchingService failed for: {property_}')
+        return cls(self._client, service)