Manjaro Linux is described as 'Manjaro is a user-friendly Linux distribution based on the independently developed Arch operating system. Within the Linux community, Arch itself is renowned for being an exceptionally fast, powerful, and lightweight distribution that provides access to the very latest cutting' and is a very popular Linux Distro in the os & utilities category. There are more than 100 alternatives to Manjaro Linux for a variety of platforms, including Linux, Self-Hosted, Mac, BSD and Windows apps. The best Manjaro Linux alternative is Linux Mint, which is both free and Open Source. Other great apps like Manjaro Linux are Arch Linux, Ubuntu, Debian and Fedora.
If you want to replace Manjaro, macOS is unlikely to be the answer. macOS works best on Apple's hardware - Linux can be a challenge to run on that. MacOS is also proprietary, closed source and far less customizable. Good Manjaro alternatives might be Antergos (Arch-based), Fedora, OpenSuse, ElementaryOS or even Qubes, depending on your needs.