The caret symbol is used in math and means a partial conjunction in symbolic logic, also known as the wedge, according to Wolfram Mathworld. Most computer keyboards, including the Mac's, make typing the caret symbol easy. It is on a number key, right above the letter keys on most Mac keyboards.
Open a word-processing program or any other application in which you can enter text, such as TextEdit.
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Hold down the "Shift" key on your Mac keyboard.
Press the "6" key while holding the shift key and the caret symbol (^) will appear in your text.