How to print from Office 365 Excel Online (Mac)

Excel for Office 365 Online has a confusing print system. When you first select File ⇒ Print from the Excel menu (not the browser menu), an excel specific dialog appears on the right of the sheet with a printer dropdown which does not show any of your printer. In order to get to the normal Mac printer dialog you need to press the big 'Print' button, which brings up the Mac printer dialog where you can select one of your normal printers.

See screenshots below for more details:

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