MacOS – How to change the language for automatic spelling correction

input-sourcelanguagemacosspellcheckspelling

I set my input source to be US English. And the flag showing on the taskbar is also an American flag.

But whenever I type something in Mail.app or Notes.app the spell check still corrects my spelling to British English:

  • e.g. it highlights my "organize" and suggest s"organise".

Please, how to make my Mac (OS X 10.8) an American?

Best Answer

For OS X 10.8:

System Preferences > Languages & Text > Text > Spelling

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Or for OS X 10.9 and later:

System Preferences > Keyboard > Text > Spelling

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