mac2jb: a Mac acts as a USB keyboard to start ns2jb on Switch 2
Developer @cpypwn released mac2jb v0.1.0 (MIT license). The tool makes an Apple Silicon Mac pretend to be a USB keyboard to start pepsipu's ns2jb on Switch 2. It uses USB emulation libraries by Shiny Quagsire. According to the author, it was tested on a single configuration only. It is experimental and relies on a third-party macOS driver; for the test, the author turned off Mac security protections and warns this lowers security. ns2jb itself is unchanged: tethered (gone after reboot), no kernel access, no CFW.
Context
Also on Oct 22, 2026: Alula (@__alula) said games made with the Artemis Engine can work as entry points, but only together with another vulnerable game, and stated Nintendo 'WILL block' save transfers. That is her view; Nintendo has announced nothing. Gezine (@gezine_dev) said he would not recommend buying Artemis Engine games because of the exploit, since save exploits are a bad choice if Nintendo blocks the online service.
Not verified yet
- Operation outside the author's tested configuration (the author says it is not verified).
- Independent testing: the result is reported only by the author, on one device.
- Identity of @cpypwn: account created Oct 5, 2026, no name or bio.
- Nintendo blocking save transfers: Alula's claim, no official announcement.