Apple's New USB-C Accessories Face Compatibility Issues with Older Macs

The latest Magic Keyboard, Mouse, and Trackpad require macOS Sequoia 15.1 for full functionality, leaving older macOS versions unsupported.

Apple's new USB-C Magic Keyboard, Mouse, and Trackpad were launched alongside the latest M4 Macs.
The accessories require macOS Sequoia 15.1 or later to function properly, with issues reported on older macOS versions.
Users running macOS Sonoma or Ventura report problems with pairing and functionality, including inoperable Touch ID and function keys.
Even the macOS 15.2 beta does not fully support the new accessories, suggesting a need for further updates.
Apple has not confirmed if a software update will address these compatibility issues with older macOS versions.