3 applications, written and supported by the two people who answer your email. Each one is built for a job we needed doing ourselves.
Every claim on this page was read off the shipping build rather than written from memory — versions, sizes, system requirements, signing status, and whether the app touches the network at all.
A live system dashboard and tune-up suite: performance graphs, drive health, an installed-app manager, a storage lens, and a set of reversible system tweaks. ArcLight Benchmarks ships alongside it and installs separately. The two builds are separate applications and differ in one important way: the Mac build makes no network connections at all, while the Windows build goes online for its driver-update feature.
macOS
Apple silicon Mac
Download for macOS ArcLightPro-Installer.pkg
Direct downloads open when the store does. The build is finished — we are just not selling it here yet. Buy it now on the Mac App Store
Windows
Windows 10 (1809 or later) or Windows 11
Download for Windows ArcLight-Setup-2.1.0.exe
Direct downloads open when the store does. The build is finished — we are just not selling it here yet.
ArcLight Benchmarks — CPU, GPU and drive testing with history and report export — is included in both installers and can be installed on its own or alongside ArcLight Pro.
Screenshots of the current build, captured on Apple silicon. Nothing is mocked up or rendered — these are the actual windows.
Not "only with permission", and not "only anonymously". None. The Mac application contains no networking code whatsoever — no URLSession, no sockets, no embedded browser — and it launches no other program that goes online on its behalf. There is no update checker, no licence check, no telemetry, no analytics and no crash reporting. There is no setting to switch any of this on, because there is nothing to switch on.
You can verify this yourself with Little Snitch, LuLu, or by pulling the Ethernet cable and turning off Wi-Fi: everything ArcLight Pro does works identically. Drive health and SMART, the cable and link-speed test, performance graphs and history, the storage lens, uninstalling apps and clearing their leftovers, login items and background agents, system tweaks, report export — all of it reads from your own Mac.
This is checked mechanically every time we build. The build script searches the source for networking APIs, and then scans the finished, signed binaries for networking frameworks and symbols. If it finds either, it refuses to produce an installer. That is why we are willing to state it this plainly.
ArcLight Pro for Windows is a separate application with a separate codebase, and it does make external calls. Its driver-update feature has to: finding a newer driver means asking hardware vendors and Windows Update what the newest version is, and a driver updater that never looks anything up would be useless. If you want a build that never touches the network, that is the Mac one.
Neither build sends anything to Cobaltmaize. We run no server that receives data from either application, we have no analytics of any kind, and your licence is validated on your own machine and keeps working with the network switched off permanently.
The licence is yours permanently and the version you paid for keeps working forever, with no expiry and no phone-home. The monthly subscription is separate and entirely optional: it pays for continued development and gets you every new version as it ships. Cancel it and the app you already have carries on exactly as it is.
$4.99 once
$2.99 per month
Payments are handled by PayPal. Cobaltmaize never sees or stores your card details.
A menu-bar companion for Lenovo ThinkPad USB-C and Thunderbolt docks on macOS. It tells you what the dock is actually doing — which of its chips the Mac can see, at what link speed, which displays it is driving, and what its audio device is set to — and it can push the dock's headphone output past the hardware maximum when it is too quiet to be useful. Free.
macOS
macOS 14 Sonoma or later · Apple silicon or Intel
Download for macOS Lenovo-Dock-Manager-1.0.pkg
The installer is finished and being uploaded — this button switches itself on the moment the file lands on the server.
What it shows you
macOS will not turn a device up past its own maximum. The volume it exposes runs from 0 to 1, and 1 is the hardware ceiling — there is no public way to ask for more. Real extra loudness has to come from a software gain stage somewhere in the audio path, which means something has to sit in that path.
So the installer adds one small virtual audio device beside the app. Switch Boost on and system audio plays into that device; Lenovo Dock Manager reads it back, multiplies it, runs it through a limiter so loud passages get louder instead of distorted, and hands the result to the dock. Switch Boost off, quit the app, or unplug the dock and your output goes straight back to where it was. If the app is ever force-quit while boosting, it repairs the routing the next time it launches.
The plug-in is a plain user-space audio driver — not a kernel extension and not a system extension. It is signed with the same Developer ID as the app and notarised with it. Everything else in the app works whether or not you ever turn Boost on.
Drag Lenovo Dock Manager from your Applications folder to the Trash, then in Terminal run: sudo rm -rf /Library/Audio/Plug-Ins/HAL/LenovoDockBoostDriver.driver && sudo killall coreaudiod — that removes the virtual device and restarts audio. Nothing else is written anywhere on your Mac.
Like ArcLight Pro for Mac, this app contains no networking code: no URLSession, no sockets, no embedded browser, and it launches no other program that could go online for it. There is no update checker, no licence check and no analytics. Pull the Ethernet cable and switch off Wi-Fi and every feature behaves identically, because all of it reads from your own machine. The finished binaries are checked the same way ArcLight's are — the shipped app and the shipped plug-in link nothing but Apple's own local frameworks.
The amplifier goes to +30 dB, which is a very large increase — roughly thirty times the voltage your dock would otherwise put out. Start at 0 dB and raise it slowly, and do not wear headphones the first time you switch it on. Loud audio damages hearing permanently and can damage speakers. The limiter keeps it from distorting; it does not keep it from being too loud.
Free. No licence key, no registration, no account. Use it on as many Macs as you like, at home or at work, and pass the installer on to anyone you like as long as you pass it on unmodified and free of charge. It is supplied as-is with no warranty of any kind, and no fee has been paid for it. The full licence is shown during installation and is also inside the app bundle, along with the attribution notices.
Lenovo Dock Manager is published by Cobaltmaize and is not a Lenovo product. Cobaltmaize is not affiliated with, authorised by, endorsed by, or officially connected to Lenovo in any way. Lenovo, ThinkPad and ThinkPad Hybrid USB-C with USB-A Dock are trademarks of Lenovo; DisplayLink is a trademark of Synaptics; Mac and macOS are trademarks of Apple. Those names appear here for one reason only — to say which hardware this software is for. The app contains no Lenovo software and no vendor firmware, protocol documentation or proprietary command set: it reads what macOS already reports about attached USB devices, and writes only through public CoreAudio interfaces that any application may use. If any rights holder believes otherwise, please write to shaun.reiland@gmail.com and we will engage promptly and in good faith.
A personal ebook and audiobook library for macOS. Point it at a folder of books and a folder of audiobooks; it reads what is there, builds an index, finds cover art, and otherwise stays out of the way. No account, no subscription, no sync service.
macOS
macOS 14 Sonoma or later · Apple silicon or Intel
Download for macOS BiblioBritaniana-1.1.pkg
Direct downloads open when the store does. The build is finished — we are just not selling it here yet.
Screenshots of the current build, captured on Apple silicon. Nothing is mocked up or rendered — these are the actual windows.
Biblio Britaniana works offline. Two optional features reach the internet: cover-art lookup and synopsis lookup. Both query Open Library (Internet Archive) and the Google Books API with a book's ISBN, or its title and author. Nothing else is sent — not the contents of your books, not your file paths, not your reading positions, and no identifier of you or your Mac. There is no telemetry, crash reporting, analytics or advertising. Both features can be switched off on first launch and at any time in Settings › Privacy.