By default, TextEdit may open as a Rich Text document ( .rtf ). To ensure you are saving a standard plain text ( .txt ) file, follow these steps:
To download or create a new plain text ( .txt ) file on a Mac, you primarily use the built-in application. Creating and Saving a New .txt File
If you cannot see the .txt extension on your files, you can toggle it: Import, export, and print notes on Mac - Apple Support
: You can import various file formats into the Apple Notes app, including TXT and RTF, to keep them organized.
: Find it via Spotlight (Command + Space) or in your Applications folder. Create New Document : Select File > New .
: If the document has a formatting bar at the top, choose Format > Make Plain Text (Shift + Command + T). This ensures the file is saved as a .txt instead of .rtf .
If you are looking to "download" existing text data into a .txt format from other Apple services: