Failed macOS Installer

Here's what worked for me:

1. Load in Safe mode (hold Shift while booting)

2. Open App Store, choose install update

3. The install will probably fail. Instead of showing an error message it will show a log.

4. Do not click "Restart", choose "Startup Disk..." from the Menu

5. The system will boot as usual, not updated

Reference: https://gist.github.com/johngrimes/3822c94c60c6c5babc6d42c2dff9fd89

Here’s what helped me to actually install the update (I think System Integrity Protection should be disabled for steps 1-2 to work):

1. sudo rm -Rf /macOS\ Install\ Data

2. sudo systemsetup -setstartupdisk /System/Library/CoreServices

3. sudo rm -Rf /Library/Updates/*

4. Changing system language from English to Russian and rebooting

5. Downloading and installing the update as usual (using App Store)

Reference for steps 1-2: upgrade - How can I abort a High Sierra installation? - Ask Different

Step 4 was not rational in any way but has a chance of being relevant.

Hi donoskaro, I've got the same problem here, did you have any luck finding a solution?

Me too

I have the same issue and these workarounds do not work for me.