If you have 8 USB sockets (Or a hub) and plug in 8 USB keyboards, then all will be recognised by Mac, Windows and Linux.
The Jack system used on the MS is also available for Windows and Mac OS, so I can’t see what you’re all excited about.

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).