Hi everyone, For some reason, on my Late 2015 iMac Retina, iMessage will lag (beachball) like mad and really delay my messages when trying to type them. I've got 16GB loaded into this beast, and it's a new machine. Why is this? It worked like a charm on my Late 2012 iMac. Opening and closing does nothing to help, nor does a reboot. All other apps are fine. Thanks for any input. Am running 10.11.2.