Circinus Mod Manager

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On the record

Conflict detection

It flags mods that share textures, patch the same definition, or hook the same method, and identifies which one takes effect.circinus.sh · read 11 Oct 2026

Custom rules

Users can override HALO with their own rules, and the app identifies conflicting rules so one can be removed and sorting can finish.circinus.sh · read 11 Oct 2026

Download verification

Each download lists a SHA-256 fingerprint that users can compare against the downloaded file.circinus.sh · read 11 Oct 2026

Imports

It can import mod lists from ModsConfig.xml, save files, Steam collection links, RimSort exports, rentry pages, and clipboard contents.circinus.sh · read 11 Oct 2026

Limit

The macOS build is not signed with an Apple certificate yet, so first launch requires clearing macOS quarantine; Intel Macs are unsupported.circinus.sh · read 11 Oct 2026

Load order

Its HALO system sorts mods into eight phases based on mod contents and explains why each mod is placed where it is.circinus.sh · read 11 Oct 2026

Mod source access

external linkscircinus.sh · read 23 Sep 2026

Offline use

Sorting and checking work from files already on disk, and community databases stay off until users enable them.circinus.sh · read 11 Oct 2026

Pre-launch checks

It checks for missing dependencies, declared incompatibilities, misplaced definitions, duplicates, and texture collisions.circinus.sh · read 11 Oct 2026

Privacy

The manager works with files kept locally, and sharing data with the site is off unless the user turns it on.circinus.sh · read 11 Oct 2026

Project status

Circinus describes itself as an independent, community-run project unaffiliated with Ludeon Studios.circinus.sh · read 11 Oct 2026

Purpose

Circinus Mod Manager is a desktop app for arranging RimWorld mods before starting the game.circinus.sh · read 11 Oct 2026

Support

The independent project has one human-read inbox, no ticket system or autoresponder, and says replies usually arrive within a day or two.circinus.sh · read 11 Oct 2026

Supported platforms

multi-platformcircinus.sh · read 23 Sep 2026

Supported systems

The manager is available for Windows, Apple Silicon Macs, and Linux; the Mac build requires M1 or newer and Linux uses an AppImage for 64-bit distributions.circinus.sh · read 11 Oct 2026

Updates and signatures

The app checks for a newer version at startup, asks before installing it, and refuses updates whose signatures do not verify.circinus.sh · read 11 Oct 2026

Workshop downloads

Workshop mods download through SteamCMD in a queue that pauses when Steam slows down, retries failures, and resumes after the app closes.circinus.sh · read 11 Oct 2026

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