Harmony 12 Advanced slow and buggy on Mac Mini (late 2012) 2.3 Ghz intel Core i7

Upgraded to Harmony 12 Advance from Animate 3 and it has been a bit buggy and I’m getting a lag in my vector drawings when animating. My computer is a Mac Mini (late 2012) 2.3 Ghz intel Core i7. Any help would be appreciated. in the middle of project.