You can check the mac performances from this benchmark list. On this list; look at the multicore tab for the real performance.
I'm using Mac Mini Server (Late 2012) : Intel Core i7-3615QM @ 2.3 GHz (4 cores) - 8 GB RAM -- it has 10656 benchmark on this list. I've put a SSD to it so it became faster than the untouched version. It works smoothly good on High Sierra.
I can say you can use a mac that has above 11000 benchmarks.
By the way, you can see that 2010 Mac is pretty slow acording to this consideration.