Minimum mac spec for 4k colour corection and smooth video

Hi all,

New here, and new to this whole video editing thing, I wanted to ask if anyone is using either a mac mini or a basic level imac 2017/2018 for 4k video editing?

I currently run a macbook pro 2.6 GHz Intel Core i5 with 8 GB 1600 MHz DDR3 and a Intel Iris 1536 MB  graphics card and I struggle to get the 4k footage to run smoothly in premier pro. I use final cut x for editing the clips together as it seems to run the footage nicely.

I'm looking at getting a new mac but budget is a concern and I don't want to go to windows as I'm a lifelong mac user.

Any info on how I can make my workflow easier as I love the colour grading Premier Pro offers.

Thanks in advance,

Dan.