Newline characters in cells of written workbooks

When values v of cells contain unix line endings \n they do not become line breaks in the corresponding cells of the written workbook. However, when the Windows carriage return newline combos \r\n are used Excel appears to properly break the lines when a cell containing them is double clicked (edited).

So there appear to be two things to potentially address here:

1. Unix line endings \n do not become new lines at all in the written file
2. Windows line endings \r\n only become newlines in Excel when the cell is edited. This may be a shortfall in Excel for Mac 2011 and may not apply to the Windows version.

[qqilihq]

Did someone find a workaround? We the same issue on Excel macOS and Excel Windows – text is shown in a single line and changes on double click.

Apple Numbers shows the file correctly.

[fozcode]

I could only get this working correctly using the Pro edition where the saving of cell styles is supported. It needed: \n in the string value, bookSST: true, cellStyles: true in XLSX.write, and cell.s = { alignment: { wrapText: true } } in the cell style.