• Bluetooth On A Mac
• Android Bluetooth Mac Address Randomization
• Android Bluetooth For Mac Computers

This tool can be used to find bluetooth MAC addresses of your bluetooth wireless devices. Instructions: - turn bluetooth on - start the searching procedure - put your bluetooth device in discovery mode - press the address that appears to copy it to clipboard - paste the address somewhere else by holding any text area with your finger and selecting Paste This app displays all addresses of. Mac Adress Finder is used for finding mac addresses of all types of Bluetooth Devices. It can also find a mac address of any unpaired or paired device. It can also used to find whether personal device is BLE OR not and other info of personal Bluetooth Device along with its mac address. On your Mac, click the Bluetooth status icon in the menu bar, select a device or computer, then choose Browse Files on Device. If you don’t see the Bluetooth status icon, choose Apple menu System Preferences, click Bluetooth, then select “Show Bluetooth in menu bar.”. Open Bluetooth preferences for me.

Starting in Android 8.0, Android devices use randomized MAC addresses when probingfor new networks while not currently associated with a network. In Android9, you can enable a developer option (it'sdisabled by default) to cause the device to use a randomized MAC addresswhen connecting to a Wi-Fi network.

In Android 10, MAC randomization is enabled by defaultfor client mode, SoftAp, and Wi-Fi Direct.

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MAC randomization prevents listeners from using MAC addresses to build a historyof device activity, thus increasing user privacy.

Additionally, MAC addresses are randomized as part ofWi-Fi Aware andWi-Fi RTT operations.

Implementation

To implement MAC randomization on your device:

1. Work with a Wi-Fi chip vendor to implement the following HAL methods:

   • IWifiStaIface#setMacAddress: Configures the MAC address of theinterface. The default implementation brings the interface down, changesthe MAC address, and brings the interface back up.
   • IWifiStaIface#getFactoryMacAddress: Gets the factory MAC of wlan0using an ioctl call.
   • ISupplicantP2pIface#setMacRandomization: Sets P2P MAC randomizationon/off in the supplicant.

2. Setconfig_wifi_connected_mac_randomization_supported to true in the Settings config.xml (this can be done in a devicecustom overlay).

   • This flag is used to control whether client-mode MAC randomization isenabled.

3. Setconfig_wifi_p2p_mac_randomization_supported to true in the Settings config.xml (this can be done in a devicecustom overlay).

   • This flag is used to control whether Wi-Fi direct MAC randomization isenabled.

4. Test your implementation using the methods described inValidation.

Bluetooth On A Mac

The System UI must:

• Have an option to enable or disable randomization for each SSID.
• Have MAC randomization enabled by default for all newly added networks.

Use thereference implementation of Settings UI to implement new prompts.

Devices running Android 9 or lower might not havesupport for Wi-Fi MAC randomization. When upgrading such devices to Android10, the Wi-Fi MAC randomization feature can be disabledby setting the WIFI_HIDL_FEATURE_DISABLE_AP_MAC_RANDOMIZATION flag to true inthe Wi-Fi vendor HAL make file.

Validation

To validate that the feature is working as intended, run both an integrationtest (ACTS) and a manual test.

To run an integration test, use the ACTS file,WifiMacRandomizationTest.py, located intools/test/connectivity/acts/tests/google/wifi, to verify that the device usesthe randomized MAC address and correctly stores the randomized MAC address foreach network.

To run a manual test:

Android Bluetooth Mac Address Randomization

1. Verify that MAC randomization is enabled on the device by checking thatconfig_wifi_connected_mac_randomization_supported is set to true in thedevice overlay.
2. Connect to a Wi-Fi network.
3. Tap the network to go to the Network details page. Verify that MACrandomization is turned on. Verify that the MAC address displayed is arandomized MAC, which has the locally generated bit set to 1 and themulticast bit set to 0.
4. Turn MAC randomization off. Connect to the same network and verifythat the factory MAC is being used.
5. Delete the network by tapping Forget on the Network details page.

6. Connect to the same network and verify that the same randomized MACaddress is being used.

   Note: Randomized MAC addresses are generated per SSID and are persistent.

To test MAC randomization on a pre-Android 10 device(capable of supporting MAC randomization) upgrading to Android10 or higher:

1. Have at least one saved network on a device runningAndroid 9 or lower.
2. Flash the Android 10 system image.
3. In the Wi-Fi picker, verify that MAC randomization is turned off for allsaved networks.
4. Turn MAC randomization on. Connect to the same network and verifythat the randomized MAC is being used.

Android Bluetooth For Mac Computers