Sometimes firmware updates slip in relatively unnoticed and change things a bit more than you’d expect.
That’s not necessarily a bad thing.
Apple has released a rare update to the 140-watt power adapter that ships alongside the 16-inch MacBook Pro.
While it’s unknown as to exactly what the firmware update does, it apparently brings the version number to 1.4.73 and the build number to 10M5237. Apple, which doesn’t document this kind of firmware update with release notes, has yet to say exactly what the update does or what fixes or changes it might offer.
Per Aaron613 on Twitter/X, this marks the first time Apple has updated the 140-watt charger since it debuted alongside the 16-inch MacBook Pro in 2021.
Apple ships all 16-inch MacBook Pros with the 140-watt power adapter, which is needed for fast charging along with the supplied USB-C to MagSafe 3 Cable. On the newest M3 models, fast charging is also available with Apple’s 240W USB-C Charge Cable so the update may be related to that new functionality.
There’s currently no way to force the charger to update, and it will eventually update when plugged in and attached to a 16-inch MacBook Pro notebook.
To check your firmware version, go to the General tab in System Settings, then click About and scroll down to System Report. Then click the Power tab and scroll down to AC Charger Information.
If you’ve seen this change on your end, please let us know about your experience in the comments.