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A new firmware for the Apple USB-C to MagSafe 3 Cable, which is used to charge the most recent MacBook Air and MacBook Pro models, has been released.
Although it’s unclear what the firmware updates or repairs, it’s unlikely to bring about any obvious changes. The firmware’s build number is 10M1543, and its version is 3.1.12, according to tweets from Aaron Zollo. As far as we are aware, this is the first firmware upgrade since the cable was introduced in 2021 along with the new MacBook Pro.
The cable cannot be updated directly, but it ought to do so when plugged into your Mac. It is not immediately clear how to check the specific firmware version of the cable, despite the fact that you can check the firmware of your power adapter by connecting it to your Mac and clicking on the Apple logo in the top left corner of the menu bar, followed by About This Mac, System Report, and Power. On Twitter, some customers have noted that the cable’s light turned off for roughly ten seconds before coming back on, which may mean the firmware has been installed.
When the MagSafe cable is disassembled, a circuit board with several chips that is similar to the MagSafe iPhone charger is readily visible. ChargerLab revealed a ST Arm Cortex M4 180Mhz CPU with a floating-point unit and 512KB flash memory in their breakdown of the MagSafe Charger for the iPhone, so it’s likely a similar chip is in the MagSafe 3 charger.
The M2 MacBook Air and the 2021 and 2023 MacBook Pros are among the MacBooks that support charging through the MagSafe 3 connector.
Information regarding the MagSafe iPhone Charger has been updated on February 17.
