iMac 27" 5K Retina startup glitch

[kengzz]

When I startup iMac retina 5K I always see a little glitch every time when startup iMac
But everything work fine.
OS Sierra 10.12.3

Video glitch at 0.2 sec

Is it hardware or OS glitch ?
I’m anxious

Should I Worry About This or Should I ignore the glitch ?
Thank you very much

-------------

Update 28/3/2017

The glitch has been solved by update OS Sierra to 10.12.4
Thank you everyone here

 

[Fravin]

Take it easy...

It's not a hardware issue. We have a lot of members reporting the same thing. You could see some glitchs at shutdown too.

It's scarry, but it's software related. In the next update it will be fixed. I'm running the Beta of Sierra and have no more glitchs.

 

[Fishrrman]

If everything else runs fine, I wouldn't worry.
Could just be software, while the OS loads up.

 

[kengzz]

Update !!!

The glitch has been solved by update OS Sierra to 10.12.4
Thank you everyone here