Here is the iPad showing the iMac is seen, but not paired.

I tap the ‘iMac’ line and here is what I see

Over on the iMac, this appears:

If I try to type the code (which appeared on the iPad) on the iMac, I just get a system beep.

So I seem to have no choice except to click yes.

When I do that, the iMac appears to be ’working’…

but the iPad immediately tells me that pairing has failed:

The iMac “Pairing Request” window disappears in a few moments, and then I am left back where I started.