I just got the USB mouse for my mac, and its a significant improvement on the trackpad, the delay is much less. That meant a few times i clicked too early, as I had started to learn to click a bit earlier than I needed to allow for the mouse pad lag.
It is a cheap mouse, less than 10 dollars, it does fine
But What i do not get now is the click and the line goes half way past ding before it is recognised as is usual for the mousepad.
But again - clearing chrome history and cache, flash cache, restarting laptop etc, only got me a nice smooth meter for one shot, after that it was a little jumpy and speeded up.
It is still barely playable if you remain patient, hold the club at upswing in order to let your CPU calm down from the effort of raising the club, and if you see jitters on the way down, let the meter just run and do another stroke.