It would help if you told us what you were trying to do when this msg appeared...
I was reinstalling macOS. Cannot recall whether it was from a USB drive or from softwareupdate. But it appears it was using color samples from the display to determine the authenticity of the boot image. The check was failing.
I can’t find any information about this.
I recently posted an issue where every time I attempted to install macOS, I would get an error saying that the update “could not be personalized,” in proximate phrases. All the fixes online—trying from Settings, trying from App Store, trying from terminal, trying from Safe Boot—did not work. Nor did mounting a USB drive containing the install package from Recovery Mode.
Ultimately, I took it into Apple. They were unable to flash the firmware. It woudnt recognize their configuration Mac, so they took it for about three days, replaced the logic board, replaced the SSD, and replaced the display.
I’m trying to sort out what exactly was going on. Apple will not respond with what that error refers to. I’m hoping one of you might know.