You can use Linux Mint. You're welcome.

I want to set a macOS theme to kubuntu distro. But are there any distributions with a better macOS theme than kubuntu? Except for elementryOS.

I guess you want to make the OS you are using look differently/better. You may want to try different themes and preferences as KDE is perfect to customize. If you want to try different Desktop Environments, you can try Solus and Deepin.

Greetings social. I'm Now'a using kubuntu. Can you recommend me a nice looking Linux distribution? Thank you.

I already opened it instead of english.

Manjaro XFCE Minimal is best for me, also u can try Clear Linux.

Every GNU/Linux distribution is nice looking if you know how to customize it.