As you noticed LibreOffice has a good API, and we use that on Linux and Windows. We also recommend LibreOffice over OpenOffice, since it is more actively developed.<br>The reason that LibreOffice is not currently supported on Mac is that we can't use the API directly, but must use some kind of API bridge solution, which makes it a bit tricky, but not impossible, and we would like to add it.<br>I can describe the issue in details if needed...<br>