I can’t speak to your 2013 but I ran Premiere on a Mid 2014 with 2.5 Ghz i7 and 16 GB of memory – for several years quite successfully. I attached two monitors and an external Western Digital Passport drive, and went to town. Most of the time I was editing relatively simple 2-3 minute videos. Nothing extraordinarily complex. I can tell you the biggest thing that helped was converting ALL of my video to Pro Res. Any flavor. The stuff is made for editing. I tried editing MP4 a couple of times – the machine tended to go slow or falter. Otherwise I was pretty happy with performance. No problem running several tracks of video and audio… The Graphics card in this machine is a NVIDIA GeForce GT 750 M 2048 MB Intel Iris Pro 1536 MB. (reading from “About this Mac” I was running macOS High Sierra version 10.13.6 I’d say if Premiere Pro has compatible version for it still, load it up and see what happens. I was also able to run PhotoShop simultaneously, for prepping graphics when needed. Good luck!