Don't fear the "Symbol Mt Normal Font" error. It’s not a virus. It’s not file corruption. It’s just your computer reminding you that fonts, like technology, are constantly evolving—and sometimes, the symbols of the past need a little help to speak to the present.
However, if you are responsible for archiving or editing older scientific work, keep a copy of symbol.ttf handy. And now, you know exactly what it is, why it breaks, and how to fix it. Symbol Mt Normal Font
There was no way to type a Greek letter, a mathematical integral (∫), or a degree symbol (°) natively. Don't fear the "Symbol Mt Normal Font" error