Don Walker opened Mail in macOS, and discovered a whole bunch of ??????s when trying to read and use the app:

mac911 question marks in email Don Walker

What the ??? is going on? Maybe a font corruption problem or a font missing altogether.

Don writes:

System software is up to date. I use Suitcase Fusion and it’s also up to date. I tried booting up without Suitcase but that made no difference. Copying the camouflaged text and pasting into TextEdit reveals the original letters, so the underlying info isn’t lost—just hidden.

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