Missing object snap using reference for one shot in Mac

Hi there,

I’ve searched a lot but can’t solve my problem. I’m looking for the object snaps using references for oneshot (for example between or From) they should appear when you change the setting in the sidebar, but unfortunately it doesn’t work on my Mac. They don’t appear and are faded out. can someone help me?

How it should be:

f3ada30e80ff4ea6c71bf01939b7564f253ab204

That is my interface:

Bildschirmfoto 2021-01-19 um 19.14.12

Hello - ‘one-shot’ snaps are available only when Rhino is actively looking for a point.

-Pascal