Screen goes black for a second when booting

[christian.garnadi]

Hi everyone,

i got a little problem with my mac. when i boot my macbook the screen will always goes black for a second than it's continue to loading. this is happen after i update to MacOs High Sierra. is this normal? if not, how do i fix it?

I don't speak English well, so sorry for any mistakes.

 

[Bending Pixels]

It's normal - it's part of the boot process