That info would probably help:
iMac 2013
Processor 2.9 GHz Intel Core i5
Memory 16 GB 1600 MHz DDR3
Graphics NVIDIA GeForce GT 750M 1024 MB
Software OS X 10.9.5
Adobe Premiere Pro CC ver 7.2.2
I also have FCP7 running on the same computer, and currently have no operating issues with that