Mac Studio (2025) Ethernet Board
Before You Begin
Warning
Read Mac Electrical Safety and follow workspace handling guidelines before you begin.

Remove the following parts before you begin:
Tools
Adjustable torque driver (10–34 Ncm)
ESD-safe tweezers
Ethernet cable
Nylon probe (black stick)
Torque driver (orange, 0.85 kgf cm)
Torx Plus 3IP 44 mm half-moon bit
Torx Plus 4IP 25 mm bit
Torx T6 70 mm bit
Refer to a full list of tools required for all repairs.
Removal
Note: If you’ve already completed the removal steps, skip to reassembly.
Use the orange torque driver and 3IP bit to remove the two 3IP screws (923-12499) from Ethernet board connector cowling 1.
Remove Ethernet board connector cowling 1 and save it for reassembly.
Use the black stick to lift the end of the Ethernet board flex cable off the connector on the logic board.
Stand the computer on its back with the front ports facing up.
Use the adjustable torque driver and 4IP bit to remove the two 4IP screws (923-12506) from Ethernet board connector cowling 2.
Remove Ethernet board connector cowling 2 and save it for reassembly.
Use the black stick to lift the end of the Ethernet board flex cable off the connector on the Ethernet board.
Use the adjustable torque driver and Torx T6 bit to remove the two 6IP screws (923-12496) from the Ethernet board and power cord port.
Lift the Ethernet board out of the housing.
Reassembly
Stand the computer on its back side.
Position the Ethernet board in the housing.
Use the adjustable torque driver and Torx T6 bit to partially reinstall the two 6IP screws (923-12496) into the Ethernet board.
Note: The screws pass through screw holes in the Ethernet board and power cord port and thread into the housing.
Press the end of the Ethernet board flex cable to the connector on the Ethernet board.
Position Ethernet board connector cowling 2 over the connector.
Use the adjustable torque driver and 4IP bit to partially reinstall the two 4IP screws (923-12506) into Ethernet board connector cowling 2.
Note: The screws pass through the cowling and Ethernet board and thread into the standoff screws of the back Thunderbolt ports.
Rotate the computer so the front ports are facing you.
Press the end of the Ethernet board flex cable to the connector on the logic board.
Position the Ethernet board connector cowling 1 over the end of the flex cable. Then use the orange torque driver and 3IP bit to reinstall the two 3IP screws (923-12499) into the cowling.
Position the computer so the rear ports face you.
Plug an Ethernet cable into the Ethernet port to ensure Ethernet board alignment. Adjust the alignment of the Ethernet board until the end of the cable is easy to insert and remove.
Set the torque value on the adjustable torque driver to 20.5 Ncm. Then use the adjustable torque driver and Torx T6 bit to fully reinstall the two 6IP screws into the Ethernet board.
Set the torque value on the adjustable torque driver to 10 Ncm. Then use the adjustable torque driver and 4IP bit to fully reinstall the two 4IP screws into Ethernet board connector cowling 2.
Reinstall the following parts to complete reassembly: