Recommended system specs for dual booting macOS and Linux

I need to build a new Intel/AMD system. I’ll run Linux on it. I know what I need for that.

I want to run macOS on it. I want it to work well and be fast/snappy. I’ll need things like iCloud to work.

Hoping folks can help me with what kind of CPU, MB, GPU to get? I’ll use SSDs. Everything is hooked up to a 5120x1440 ultra wide monitor.

macOS is the deciding factor here. I know any system I build will work with Linux. I’m not sure about macOS.