What change should I make on this PC?

Hello everyone I currently have a Window PC and after doing some research, I am really interested in turning my PC into a “replica” MacOS device.

Here is the build:

CPU: Intel core i7-8700K 3.70Ghz 12MB Intel Smart Cache (Coffee Lake)

Motherboard: ASRock Z370 Pro4-CB ATX

GPU: GeForce GTX 1060 6GB GDDR5

HDD: 500GB WD Blue Series SATA-III 6Gb/s SSD

HDD2: 2TB SATA-III 6.0Gb/s 64 MB Cache 7200RPM HDD

No overclocking

I would like to know what changes can I make to make this a better device! Opinions are greatly appreciated!