Num Lock is off, and I've been experiencing the same issue on two different machines, an iMac desktop and a Toshiba laptop - running Noble Numbat on the iMac, and Jammy Jellyfish on the Toshiba. The laptop doesn't have a Num Lock option. It does feel like it could be (and it wouldn't surprise me) if it were pilot error to blame, just not sure what I'm doing wrong.
I do get an interesting print out in the terminal when trying any of interactive functionality - this prints only when I exit the action I was attempting (like "abort zoom", or "end picking", etc...)
"Warning: Actions not found: startZoom, zoomMotion, endZoom, startPan, panMotion, endPan"
Seems suspicious, is this warning normal?