This is the #1 complaint regarding High Sierra 10.13.6. Because the OS was released in 2018, Apple’s internal certificate expired in October 2021. If your Mac’s date is set to today , the installer will refuse to open.
This report covers the final release of macOS High Sierra (10.13.6) download+macos+high+sierra+10136+exclusive
Once you have downloaded the Install macOS High Sierra.app or DMG, you need to create a bootable USB drive to perform a clean install. Prerequisites: A USB flash drive (16GB or larger). This is the #1 complaint regarding High Sierra 10
现在，你的旧 Mac 重获新生的密钥已经在你手中，按照这份指南，让它重新平稳地运行起来吧。 download+macos+high+sierra+10136+exclusive
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