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It is considered outdated by Apple. It lacks modern security updates, so it is recommended to use it offline or with enhanced security measures.
macOS High Sierra was first announced at the WWDC 2017 keynote on June 5, 2017. The update was designed to optimize and refine the user experience while introducing innovative technologies. It was named after the Sierra Nevada mountain range in California, continuing Apple's tradition of naming its macOS versions after locations in California. macos high sierra 10.13.1
Fixed an issue where Bluetooth might appear unavailable during Apple Pay transactions.
A small percentage of users who upgraded directly from macOS Sierra (10.12.6) to 10.13.1 rather than a clean install found themselves stuck in a login loop: entering a correct password would flash the screen and return to the login window. The only workaround was booting into Recovery Mode and resetting the home folder permissions via Terminal. Do you need detailed technical steps on this
If you are currently running 10.13.1, you can improve system speed with these steps:
As of 2026, many users still encounter because it is the highest supported version on several older Mac models, such as: Late 2009 iMacs Late 2010 MacBook Airs Many 2011-2012 MacBook Pros System Requirements RAM: 2 GB minimum (4 GB recommended). macOS High Sierra was first announced at the
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