Apple releases macOS 10.13.3 supplemental update with with Telugu text bug fixes Apple has released macOS High Sierra 10.13.3 Supplemental Update with a fix to CoreText wherein a Telugu character could crash text apps. Apple addressed a memory corruption issue via improved input validation. macOS 10.13.3 Supplemental Update is available via Software Update. Apple releases iOS 11.2.6, watchOS 4.2.3, and tvOS 11.2.6 with with Telugu text bug fixes Apple has released iOS 11.2.6, watchOS 4.2.3, and tvOS 11.2.6 with fixes to CoreText wherein a Telugu character could crash text apps. Apple addressed a memory corruption issue via improved input validation....