Apple's TextEdit program is a basic text editor included with OS X, which like WordPad for Windows can be used to quickly create text documents in plain text (.txt) or in rich text (RTF) formats ...

Microsoft and Windows Notepad's renowned rivals have long employed advanced features, including Apple's TextEdit for the Mac.

If you like working in a word processor and pasting into CORE, consider using a plain text editor such as Notepad for Windows or TextEdit for Mac, instead of other programs.