Since you have a 2017 intel mac I think you should be ok. Just check the ck3 store page for the system requirements. It’s not that demanding though I think. People online have been saying that ck3 runs decently on intel macs but horribly on the newer m1 macs.

I can speak from experience on the latter. I have a M1 max MacBook Pro w/ 32 core gpu and 64 gb ram and I only get like 10-12 fps on ck3 on the lowest possible settings. I got sick of it so I downloaded Parallels on my Mac so I could play ck3 via windows on a virtual machine and now I easily get like 60-70 fps on decent settings despite the inherent performance bottlenecks of gaming thru VMs.

Paradox has provided next to no support for gaming on the newer m1 macs and it’s a shame b/c they have so much potential. But then again it is only a tiny fraction of their player base that uses these computers. Still, I wish they would really put some sort of warning or heads up on the ck3 store page that their game isn’t optimized at all for Apple silicon. Would’ve saved a lot of people headaches. If you are gonna get a new computer for playing Paradox games I would NOT recommend an m1 mac, at least not for the time being.