Turning off password logins on a Mac is easy to do. You can disable password login by accessing System Preferences and making a number of changes to the Users & Group settings. If FileVault is on, you must first disable it before you can turn off password login.
Step
Part 1 of 2: Disabling FileVault

Step 1. Click the Apple icon
The icon is the Apple logo in the upper-left corner of the menu bar (menu bar).

Step 2. Select System Preferences

Step 3. Click the home-shaped "Security & Privacy" icon

Step 4. Click FileVault

Step 5. Click the padlock-shaped icon in the lower left corner

Step 6. Enter the password

Step 7. Click Unlock

Step 8. Click Turn Off FileVault

Step 9. Click Restart & Turn off Encryption
The Mac computer will restart.
Part 2 of 2: Disabling Automatic Login

Step 1. Click the Apple icon
It's an Apple logo icon in the top-left corner of the menu bar.

Step 2. Select System Preferences

Step 3. Click the "Users & Groups" icon which is a silhouette of a person

Step 4. Log in as administrator by clicking on the padlock-shaped icon
It's in the lower-left corner.
- Enter the password.
- Click Unlock or press Enter key.

Step 5. Click Login Options
This option is at the bottom of the left-hand panel.

Step 6. Click the "Automatic login" drop-down menu

Step 7. Click a user account

Step 8. Enter the password

Step 9. Press Enter key
Now this user account has been set up to log in automatically without entering a password.