Hi there!
Since I upgraded to the new build (Photo Mechanic Version 5.0, build 15277 (0ebcc6a) on Mac 10.9.1), PM has been just slow and laggy. I get pinwheel almost everytime I re-activate the PM window from finder, PS or whatever and simple tasks (copying medium size jpg to a folder) take a very long time (10-15 secs) and usually involve a pinwheel. Just double clicking on a folder right now took 24 seconds with a pinwheel the entire time.
It didn't do this a couple builds ago - it's always been lean, mean and fast.
any suggestions to bring it back to the Photo Mechanic I know and love?