Retina 4K iMac Sierra - Distorted/Colored Apple Boot Logo

[Tucom]

So I did a clean install via a USB drive on my Retina 4K iMac, and during the boot process with the black screen and Apple logo, when the progress bar reaches the middle or so, the Apple logo flashes red/green as does the progress bar.

Other than that the OS and machine function fine. Anyone else run into or experience this? Should this be something to be worried about?

Disc Utility found some corruption which I got fixed in Recovery mode, but still exhibits this bizarre behavior.

If anyone needs a photo or video I'll try to get one up.

Thanks

 

[blackdogaudio]

Graphics distortions during boot and which only appeared after updating to or performing a clean install of macOS are nothing to worry about as they're software glitches in early Sierra builds. I'm sure it will get resolved in future updates.

Here's a related thread for example:

https://forums.macrumors.com/threads/graphical-glitches-on-reboot.2000716/#post-23726955

 

[Tucom]

Graphics distortions during boot and which only appeared after updating to or performing a clean install of macOS are nothing to worry about as they're software glitches in early Sierra builds. I'm sure it will get resolved in future updates.

Here's a related thread for example:

https://forums.macrumors.com/threads/graphical-glitches-on-reboot.2000716/#post-23726955

Excellent, thank you. Will report back if it persists after the next Sierra update.

 

[blackdogaudio]

You're very welcome!