Ok, kind of weird to explain but will try.

On Mac version V1R5.

This isn't consistent which is what makes it frustrating.

Let's say I am making a square...I choose that tool, click to select first corner, drag for size and shape, then click for opposite corner BUT it doesn't take that click and I have to click again then it does take.

This same scenario happens with I move things or copy things plus other functions.

I am using the Apple Track Pad so don't know if that has anything to do with it.

New iMac 27" with Mavericks and 24gigs of memory.

Any suggestions would be appreciated.

Thanks,