The year 2040 triggers a date-related software bug in Apple's classic Hierarchical File System (HFS).

HFS and the Date & Time control panel from Mac OS 9.x can manage dates up to February 6, 2040, after which the clock will cycle back to January 1904.[1] Apple has since been migrating modern macOS users to its APFS file system, which does not have this limitation.

References

  1. Solving Mac OS 8’s Y2K20 Bug by Josh Centers, TidBITS. 2020-01-03.

See also

External links

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