Restart your Mac and try installing Mac OS High Sierra again through the installer file. If you encounter such errors, delete the “Install macOS High Sierra.app” file from the / Applications / folder and download the installer from the Mac App Store again. Complete the installer to restart the computer and repeat the operation, "etc. For example, “The path /System/Installation/Packages/OSInstall.mpkg seems to be missing or corrupted. When errors occur with the installation, an error message appears, and the solution most often may be to download the installer again and try to start the installation again. To solve this problem, try installing macOS High Sierra using a third-party program. Thus, you do not need to create a USB installation disk for MacOS High Sierra. Some write that they cannot download the fullthe macOS High Sierra installer and instead download the 20mb version, which in turn downloads the already complete version during installation. It may be worth rebooting the Mac itself, but this is necessary in very rare cases. Open the Mac App Store and try downloading macOS High Sierra again.Often the problem can be solved by closing the App Store and reopening it. If you have this problem, first of all, check that your Mac is connected to the Internet network at a good speed. Some users cannot even downloadmacOS High Sierra through the Mac App Store. You may find a solution to your problem below. In this article, we have compiled the most common macOS High Sierra problems and suggested possible solutions.įrom users upgraded to macOS HighSierra, a large number of error messages are received: from problems with installing the update itself to fast battery consumption, program errors, strange behavior, reading media, network problems, graphics / display, and overall performance degradation. This happens with significant updates for a large number of reasons. There are various problems with this version.