irish492: I click the mouse as the bar approaches the target for aim, and there's split second delay
What you're describing doesn't sound like meter zoom. Does it happen with all clubs? Is it ever the putter? If it were a worn out mouse, I'd expect it to happen with more frequency.
Disclaimer: What I'm about to post makes absolutely no sense, but has oddly worked before. No clue why.
I'm unfamiliar with Macs. What kind of port is the mouse plugged into? On PCs just plugging the mouse into a different USB port sometimes helps.