How to Stop Encryption on Mac?

Use FileVault to Encrypt the Startup Disk on your Mac

Choose Apple menu > System Preferences, then click Security & Privacy.
Click the FileVault tab.
Click , then enter an administrator name and password.
Click Turn Off FileVault.

Can I Turn off my Mac while FileVault is Encrypting?

You can safely use, shutdown, sleep, and restart your Mac during the FileVault encryption and decryption process. The process happens in the background while your Mac is awake and plugged in. FileVault encryption or decryption can take hours or days to complete, depending on your disk size and type.

How do I Stop my Hard Drive from being Encrypted?

Click My Drives in the Command panel.
Select your drive.
Click Security in the Command panel.
Click Encryption.
Click Delete Encryption folder.
Click Open Encryption folder, decrypt and save files and folders stored in the Encryption folder, and close the Encryption folder.