1. Check wiring and connections

Step 1: Restart your Mac and make sure both the dock’s power cable and the audio cable are properly and securely connected.

Step 2: Reconnect the dock to your Mac via the Thunderbolt cable. If necessary, flip the dual USB-C connector on the Mac side and try again.

Step 3: After plugging into the 3.5mm audio jack, wait about 20 seconds before use.

Step 4: Unplug the DC power cable, wait 30 seconds, then reconnect it.

Step 5: Check that the dock’s 3.5mm audio jack is clean and free of debris. If needed, use compressed air to clear it.

Step 6: If possible, verify that the audio cable connected to the dock works properly.

2. Check sound settings

Step 1: Temporarily disconnect all other devices from the dock, keeping only the audio cable (connected to the dock’s audio port) and your keyboard/mouse.

Step 2: Go to Apple menu >System Settings (or System Preferences) > Sound.

Step 3: Go to Sound > Output > select the speakers or headphones connected via the audio cable.

*If "Internal Speakers" do not appear in the "Output" device list, please contact the iVANKY support team.

Step 4: Check the Output volume: If the level is too low, drag the slider to the right and test again.

Step 5: Check the Mute checkbox: If selected, deselect it and test again.

3. Port Alternation

Step 1: Alternate between the front and rear audio ports

Step 2: Recognition may take some time; please wait for about one minute.

Step 3: If the port still does not work, please contact the iVANKY support team and provide the following information so we can check for possible device compatibility issues:

-The port number that is not working

-macOS version

-Device that cannot be used and its model

-Purchase link (if available)