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

Tucom

macrumors 65816
Original poster
Jul 29, 2006
1,173
247
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
 

Tucom

macrumors 65816
Original poster
Jul 29, 2006
1,173
247