https://www.ripperdoc.de/wiki/en/docs/mac-repair/apple-silicon/macbook-update-26-4-1-dfu-4042/
MacBook suddenly stopped working after the update to macOS 26.4.1 | wiki.ripperdoc
Apr 19, 2026 - Your MacBook won't boot after the 26.4.1 update. Why a DFU restore fails with error 4042 and how to recover the machine with a double revive without losing...