mq-dir vs Directory Opus: the kitchen-sink question

Directory Opus is the most feature-rich file manager ever made. It's been a labor of love since 1990 (originally on Amiga, then Windows). mq-dir is a 2026 minimalist macOS app that picks a tiny corner of the file-manager design space and aims to do that one corner well.

This is the philosophical comparison, since the feature comparison is silly (DOpus wins every match by surface area).

TL;DR

• Directory Opus if you're on Windows, want every feature ever conceived, and enjoy customizing.
• mq-dir if you're on macOS and want focused parallel-work tools with low maintenance overhead.
• They don't actually compete. Different platforms, different philosophies.

What Directory Opus is

Directory Opus is the maximalist position taken seriously:

• Every feature is configurable. There are roughly 4000 preferences across all the panels.
• A full scripting language (Lua) for customization.
• Hundreds of toolbar buttons you can rearrange, rename, repurpose.
• Dozens of viewers (HEX, image variants, PDF, archive types).
• Filtering, regex, batch operations everywhere.
• FTP/SFTP/Cloud built-in.
• Tags, ratings, metadata management.
• Tabs, dual-pane, optional triple-pane.
• A full file synchronization engine.
• A custom column system you can extend.

If a file manager could conceivably do something, DOpus does it. Often in 5 different configurable ways.

What mq-dir is

mq-dir is the opposite position taken seriously:

• One main feature: up to 4 panes for parallel work.
• A small set of supporting features: per-pane tabs, per-tab preview, per-tab tree, projects, cmux integration.
• Religious state persistence underneath all of it.
• Almost no preferences (sort order, hidden files, that's about it).
• No scripting language. No customizable toolbar. No batch renamer (yet).

If you opened mq-dir and asked "where's the X" for X = anything not on the list above, the answer is "not here, by design."

When DOpus wins

You need batch operations daily

DOpus's batch renamer is industry-leading: regex, Lua scripts, preview, undo. If you process 50+ files daily through systematic renames, DOpus is materially better than every alternative.

mq-dir's batch ops are roadmap for v0.2; today, rename is one-at-a-time.

You need deep customization

DOpus is endlessly tweakable. Toolbar buttons, color schemes, custom commands, regex-driven filters that persist. Power users can build entire workflows that fit their hand exactly.

mq-dir is mostly non-customizable. Few preferences, no toolbar editor, no scripting. By choice — but a real loss for power users who want to mold their tool.

You want everything in one app

FTP, archive editing, file sync, content view, batch ops — all in one window. No need to context-switch to companion tools.

mq-dir scopes tightly. You'll use Forklift for SFTP, terminal for archive ops, etc.

You're on Windows

Directory Opus is the right answer because mq-dir doesn't run there.

When mq-dir wins

You're on macOS

DOpus doesn't run there. mq-dir is native.

Your workflow is parallel, not deep-feature

If you spend 80% of file-manager time on "navigate between 4 contexts" and 5% on "rename 100 files with regex," you don't need DOpus's depth. You need 4 panes that work, with persistence. mq-dir.

You value low maintenance

DOpus's customizability cuts both ways. Once you've configured it, you maintain that configuration forever — across machines, OS upgrades, app updates. mq-dir's lack of customization means there's nothing to maintain.

You want native Mac feel

Even a Mac-native equivalent of DOpus's UI density would feel un-Mac. mq-dir's spareness is closer to macOS native aesthetic.

Open source matters

DOpus is closed-source paid software ($89-$129). mq-dir is MIT-licensed free. For users who care about auditability, this is a category change.

The maintenance argument

A point worth dwelling on: feature-rich tools have a hidden cost. Every preference is a thing to configure (or rediscover when defaults change). Every customization is a thing to back up, port, re-apply. Every plugin is a dependency that may not survive the next major version.

DOpus users often have years of accumulated configuration. Migrating to a new machine or major DOpus version is a project. The investment compounds; so does the cost.

mq-dir has almost nothing to configure. Install on a new Mac: same experience as any other Mac. Reinstall: same experience. macOS major upgrade: nothing to migrate.

For some users this is irrelevant; for others it's a compelling reason to pick the constrained tool.

Migration is rare

Honest observation: most DOpus users on Windows aren't migrating to Mac. They're locked into DOpus exactly because of the deep customization, and that's a real and valid lifestyle.

The mq-dir comparison applies to two specific groups:

1. DOpus users who recently switched to Mac and are looking for a successor (there isn't a 1:1 — mq-dir is the closest in spirit but covers ~30% of DOpus's surface).
2. Mac users curious about DOpus — the answer is, you can't have it. Either run Windows in a VM, or accept Mac alternatives. mq-dir is the most credible Mac alternative in the focused-pane category.

Verdict

Directory Opus and mq-dir don't compete. They're different philosophies on different platforms.

If you're on Windows and love DOpus, keep DOpus.

If you're on Mac and value a focused tool with religious state persistence and quad-pane parallelism, mq-dir.

If you're on Mac wishing DOpus had a port — sorry, it doesn't, and mq-dir isn't trying to become DOpus. The closest Mac equivalent in feature-density is Path Finder (discontinued), then Forklift (commercial, mature). mq-dir is in a different design space.

mq-dir is free, MIT, no telemetry. Install if the focused approach matches how you work.