Undertale

Mac compatibility update was Undertale’s biggest change, addressing Mac-specific bugs and improving compatibility in January 2016. The update also documented the ESC-to-quit crash and provided instructions for reverting to the old version if problems appeared.

• Mac version: The ESC-to-quit crash was fixed, while the update’s notes preserved compatibility warnings for affected users.
• GameMaker: A known Mac-version issue remained tied to an underlying GameMaker bug that could not be resolved until the engine itself was updated.
• Steam Client Beta: The January update did not resolve issues caused by the Steam Client Beta, and the reminder was repeated in the release notes.