: 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 .

: You can import various file formats into the Apple Notes app, including TXT and RTF, to keep them organized.

If you cannot see the .txt extension on your files, you can toggle it: Import, export, and print notes on Mac - Apple Support

: Find it via Spotlight (Command + Space) or in your Applications folder. Create New Document : Select File > New .

: You can view TXT files directly in Google Chrome or Mozilla Firefox by dragging and dropping them into the window. Managing File Extensions

If you are looking to "download" existing text data into a .txt format from other Apple services:

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

: Go to File > Save , enter a name, and choose your preferred location like iCloud Drive or your Desktop . Downloading Text Content from Other Sources