Apple Releases Firmware Update for 140W USB-C Power Adapter
Apple today released a firmware update (version 1.4.90) for its 140W USB-C Power Adapter. It is unclear what is included in the latest firmware, as Apple does not publish release notes for this. The update will be installed automatically over time when the power adapter is plugged in and connected to a Mac or other device. There is no way to manually apply the update. This article, " Apple Releases Firmware Update for 140W USB-C Power Adapter " first appeared on MacRumors.com Discuss this article in our forums
What happened?
Apple today released a firmware update (version 1.4.90) for its 140W USB-C Power Adapter. It is unclear what is included in the latest firmware, as Apple does not publish release notes for this. The update will be installed automatically over time when the power adapter is plugged in and connected to a Mac or other device. There is no way to manually apply the update. This article, " Apple Releases Firmware Update for 140W USB-C Power Adapter " first appeared on MacRumors.com Discuss this article in our forums
Story details
Apple today released a firmware update (version 1.4.90) for its 140W USB-C Power Adapter.
It is unclear what is included in the latest firmware, as Apple does not publish release notes for this.
The update will be installed automatically over time when the power adapter is plugged in and connected to a Mac or other device.
Why it matters
This page keeps Apple rumors separate from official updates, so readers can follow early reports without confusing them with confirmed announcements.
Original source
https://www.macrumors.com/2026/09/08/apple-releases-140w-usb-c-charger-firmware-update/