MacOS doesn’t have a gatekeeper status in the Digital Markets Act (DMA), so Apple doesn’t need to provide it. This shows that they only provide the SDK because of regulatory pressure, and try to maintain their vendor lock-in where possible.

Multipoint connectivity is part of the spec but apparently AirPods only support it if you pretend to be an Apple device.

The FAQ mentions there will be only 12 days of puzzles and no global leaderboard: https://adventofcode.com/2025/about#faq_num_days

The AoC author also posted about this on Reddit: https://www.reddit.com/r/adventofcode/comments/1ocwh04/chang...