I saw two docks instead of one !

[jennyp]

When I woke my iMac up this morning I noticed there were two docks. One was the normal one, and there was another beside it, with one app only in it - Safari. Mousing over it I saw a tooltip with the text "from Mac" or something like that. It was definitely on a separate dock area - there was a gap between it and the regular dock. I clicked on the Safari icon in it and Safari launched normally, and the separate dock disappeared.

There is another Mac on the network - a retina MBP, if that's relevant (though I can't see how).

I've never seen this before, and I wondered what it was I came across.

 

[Ritsuka]

That's a feature called "Handoff". It shows the current app you have open on your other devices, so you can pick up whatever you were doing in your other device.

 

[jennyp]

Oh brilliant. I thought something was amiss. Thank you for that insight. Never seen it before!