Macbook displaying loading screen and default background.

The default background is to be expected when starting your Mac—this is not easily changed.

The preboot partition contains the code which handles the login for an encrypted drive, after that is successfully unlocked it is handed off to the main OS

When you have an encrypted boot volume you receive a log-in screen before the main OS boots, you have to authenticate that in order for the encryption key for the boot volume to be released.

For sleep wake issues you can Try resetting the SMC http://support.apple.com/kb/ht3964

see—

If your Mac doesn't sleep or wake when expected - Apple ...

ahtearah wrote:

Hey! Thank you for the reply.

What do you mean by the encrypted boot volume and the authentication of it? Is there any way for me to authenticate it? I'm not really tech savvy. Also, when I contacted Apple recently about the loading screen whenever I wake my laptop, they said it is the MacOS loading in the background and that it is normal. But, it is bugging me.

...loading background for a split second.

Really, that is the issue...(?)

The default is to have the Filevault encryption turned on unless you opt out.

Therefore you have to authenticate ie enter you password to proceed.

You can not have automatic login with an encrypted boot volume.

Use FileVault to encrypt the startup disk on your Mac - Apple ...