Spacebar scrolling in timeline doesn't work

Hi, I’m trying to scroll left and right in the timeline but the hand doesn’t appear at all, just stays the arrow when I press the spacebar. The hand/spacebar works in the camera and network views. Any ideas why?

I’m using Harmony 10 on a Macbook Pro early 2011

You need to hit the spacebar and left-click to drag the timeline. The hand appears when I do this on my Mac running Harmony 10.