Mojave freezes on my. Fusion drive iMac27
Interesting, @rongor. Have you run Disk First Aid (or some third-party Utility) on the disk to make sure it's OK? That's often the cause for these types of issues.
And, just asking the obvious questions, are you running low (<3GB) on disk space?
My drive passes all tests. My plan is to reinstall high Sierra the. Try again🤷🏻♂️