macOS High Sierra 10.13.5 (also known as 10.13.5 or 17F75) was a significant update to Apple's macOS operating system, released on June 4, 2018. The update brought various improvements, bug fixes, and new features to the system. One of the essential aspects of this update was the availability of the macOS High Sierra 10.13.5 image file, which allowed users to perform a clean installation or upgrade their existing systems.