Combination I/O Board Connector Cowling
Apple Part Number: 923-12487
6-Month Warranty
Full replacement
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1-2 business days
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Compatibility
| Model | Order # | Model # | EMC | Identifier | Processor |
|---|---|---|---|---|---|
| Mac Studio M3 Ultra 2025 | A3389 | Mac15,14 | Apple M3 Ultra | ||
| Mac Studio M4 2025 | A3299 | 8549 | Mac16,9 | Apple M4 Max |
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About this part
The Combination I/O Board Connector Cowling (Apple part number 923-12487) is a genuine Apple part that fits the Mac Studio M3 Ultra 2025 and Mac Studio M4 2025. This cowling is the small metal cover that secures the Combination I/O Board connector connection. That connector links the port board to the logic board. Match the cowling and its mounting hardware to the listed device model.
Before you order, match the model identifier on your Mac (Apple menu, About This Mac, System Report) to one of the identifiers listed for this part: Mac15,14 and Mac16,9.
Signs the cowling needs replacing
- USB-C or Thunderbolt ports that stop detecting devices
- Charging that works on one side only
- Ports that work only when the cable is held at an angle
- Ports that failed after the case was opened
Not sure the cowling is the real cause? We diagnose the Mac before replacing anything, and we can install this genuine Apple part for you through our Mac Studio repair service, in our Tampa shop or by mail-in repair from anywhere in the US.
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