Encrypted data recovery without password and computer unable to log in

Hi Leidy_D128,

Based on the description provided (the extra info is especially helpful), I'm guessing you performed these steps to disable FileVault:

1. Summon the Password Reset Assistant by waiting at the FileVault login screen for 1 minute, force your Mac to shut down, then power on.
2. Choose "My keyboard isn't working".

When the assistant says that decryption is complete, it is telling a half-truth. Your drive is not truly decrypted; it is only starting the decryption process and just made the required changes to your startup disk in order to facilitate decryption.

Now, normally, macOS would start up, and use the decryption key to start safely decrypting your data. However, it seems that there's a problem with the decryption process, which could complicate recovery efforts.

I'd first do Grant's suggestion and run First Aid to try to fix any problems. If that doesn't work, you could try the below steps, which create an additional macOS installation to use for recovering data.

1. Start up in macOS Recovery.
2. If prompted to authenticate as an admin, do so to continue.
3. Open Disk Utility.
4. Click the (+) button near the top left corner of the window. Choose these details, then click Add:
   1. Name: Whatever you want, but NOT "Macintosh HD"
   2. Format: APFS
5. Quit Disk Utility, then select (Re)Install macOS.
6. Select the new APFS volume as the destination, then start the install.
7. When Setup Assistant appears, don't migrate any data. Instead, create a temporary administrator account, then finish the Setup Assistant.
8. If you're asked for a password to unlock your normal startup disk, supply your normal login password that you originally had.
9. Open a new Finder window. Hopefully your normal startup disk (likely named "Macintosh HD") should appear in the sidebar of the Finder window. If it does, click on it - you might be able to view your data.

If you are able to successfully view the contents of your normal startup disk, which includes Library, System, Applications, and Users, do one of the following:

• Copy the Applications and Users folder to an external drive, or:
• If you have over half of your internal drive available as free space (check Apple menu -> About This Mac), run Migration Assistant and migrate your data from your old startup disk. Then use Disk Utility to delete the old startup disk.

Start up in recovery and launch Disk Utility. Repair-Disk/First-Aid on the boot drive and see if you can clear up any remaining issues.