macOS 10.13.4 not installed and disappeared from AppStore I started to update my MBP (2013) to macOS 10.13.4 using the AppStore.

After installation and login, I got a notification that some things didn't get install.

I opened the AppStore, macOS 10.13.4 is not available anymore to download, neither it is in the Installed section.

I checked also "About This Mac", my version is still 10.13.3

No, I never installed any Betas or GM.
Problem is solved by booting in Safe Mode and install macOS 10.13.4 from there.