How can mac os write to .xlxs?

Unity Engine
1

I konw NPOI can write and read in mac .
But NPOI can’t support .xlxs?
How can write .xlxs in mac???

2

According to the NPOI website, it does support xlxs:

Does it not work?

3

I found a better one…

It 's very goold for me!

4

Thank you for answer me

I did not succeed on mac. I don’t konw why.

NPOI support .xls is very perfect but .xlxs I don’t konw why.