
Later, you can locate the Update section to fix macOS 10.13 High Sierra won’t install failure. Step 3Choose the Apple icon on the top left corner of the screen. Then you can re-download and reinstall macOS 10.13 High Sierra update. Find and delete the Install macOS Sierra file with a question mark attached. If you fail to install the downloaded macOS 10.13 High Sierra update, you can use the following tips to fix the macOS update error. Fix macOS 10.13 High Sierra Won’t Install after Downloading

Part 3: Troubleshoot macOS 10.13 High Sierra Update Failure with a Clean Installation.Part 2: Solve macOS 10.13 High Sierra Update Failure via Safe Mode.

Part 1: Fix macOS 10.13 High Sierra Won’t Install after Downloading.
