MacOS – Catalina Beta 7 bricked the Macbook Pro

Safe Mode working means that it is likely that something you installed is preventing the OS from booting. Specifically programs you have added to start at login in your user account or other things you may have installed that adds kexts to the system.

1. Look in System Preferences > Users &Groups > Login Items

Remove them all and reboot. If it boots one of them is the problem, add them back till you find which one it was.

2. Look in /Library/StartupItems

Drag everything out of there (desktop or a folder somewhere) and reboot. As above if it boots fine one of those was the problem.

It is also possible that something went wrong with the OS and something OS related was damaged. you could try applying the latest combo updater for your current OS to see if that helps.

If nothing there helps, either I missed a location for startup items or you may need to reinstall the base OS. But before you do that, boot in safe mode and backup your drive.

You need to boot into Recovery Mode to be able to run a disk repair in Disk Utility.

Press and hold ⌘+R while booting, once you see the Apple logo you can let go.

Because your disk is encrypted, try mounting it first by opening Startup Disk, and choosing your disk as the start up disk. This should mount the drive. Then quit Startup Disk and open Disk Utility as below.

Then you should see a menu bar with a Utilities option in it, choose Disk Utility from here and run the disk repair.

Unfortunately, disk failure is a possibility, but it could also be corruption from the system going to sleep while in the middle of doing something. If you do manage to get back into your disk, I would recommend making a backup as soon as possible, as well keeping a regular backup in general.