Mainstream OS is a Linux desktop distribution that is built on Arch and features the Hyprland Wayland compositor alongside a customizable Quickshell desktop environment. It offers a user-friendly graphical installer and a settings application that allows users to manage displays, window arrangements, keyboard shortcuts, visual themes, software updates, application management, and system recovery options. Users can personalize their desktops with color schemes based on wallpapers, create and share their own themes, oversee native packages as well as Flatpak applications, and switch seamlessly into a Gaming or Console Mode optimized for Steam. Additionally, the distribution supports update snapshots and boot-menu rollback, while also providing dual-boot capabilities and full-disk encryption options during installation. This operating system caters to a range of users, from newcomers to seasoned Linux enthusiasts seeking a versatile and customizable Arch-based desktop experience, making it an appealing choice for anyone looking to tailor their computing environment. Ultimately, Mainstream OS stands out as a flexible platform for users who value both graphical setup and comprehensive administrative tools.