For a plain text (not rich text/RTF) NSTextView, I found that: Since NSTextView doesn’t understand the NSPasteboard.PasteboardType.string pasteboard type for reading or writing, I tried two approaches to handle plain text input (pasting) and output (cut/copy): The backport seems to work, but extending supported types sounds like more robust solution.

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Today I learned that a NSWindow’s field editor cannot trivially be set to “single line mode.” A field editor is a NSText subclass like NSTextView, but NSTextField is only a configurable widget that uses the field editor. How does the “single line mode” setting do what it does? I have no clue.

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