Apple’s macOS has stricter security protocols than Windows, including:
This is a common macOS error for files downloaded from the internet.
Error 422 is a , not a bug. It’s the Launcher’s generic way of saying “something blocked the write operation.” Because the root causes range from network stacks to kernel-level security, Mojang would have to rewrite the macOS launcher’s download manager entirely—something they’ve deprioritized in favor of the new Minecraft Launcher for Windows 11 and Chromebook builds.