Configure Preview to auto reload pdf and stay at the same location
There seems to be no way to make Preview.app do this, but Skim offers this feature.
On my system, using pdflatex, Skim will 'jerk' for a split second as it reloads, but it does return to the right position on the current page.
I have found a partial solution on Stackoverflow.
If you activate the single page mode (cmd 2) the focus will be stay on this page after refreshing.
You can use XEE, it's an image preview software that includes autorefresh. (http://xee.c3.cx/)