[Python] Add multiple extensions in one filetypes mac - tkinter/filedialog/askopenfilename

I am trying to use tkinter.filedialog to choose the file in Mac.

It works fine with one filetype in this way:

filedialog.askopenfilename(filetypes=[("Excel files", "*.xlsx")])


However, I want to choose either xlsx or xls files. I searched and found a question filedialog, tkinter and opening files. I use the similar way but it does not work with Mac if I change to this:

filedialog.askopenfilename(filetypes=[("Excel files", "*.xlsx; *.xls")])


How should I change to choose either xlsx or xls files in the file dialog?

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