Helm - Fifteen Mac utilities in one window. Free and open source.

Fifteen native macOS tools behind one sidebar: CPU, GPU, memory, sensor and battery monitors with 24h history, a storage analyser with a drill-down treemap, an app uninstaller that finds the leftovers, clipboard history with a global quick-paste, and a colour picker. Free and MIT. No paid tier. No telemetry, no accounts, no network calls. Not notarized — Apple only notarizes apps from $99/yr developers — so first launch needs Privacy & Security > Open Anyway. Full source on GitHub.

I was paying for four Mac utilities that each did one thing, and none of them talked to each other. Helm is the set I wanted, in one window. Two parts were harder than expected. The treemap is hand-written: every Flutter charting package will draw one, but none lets you click a rectangle to descend into it and walk back out, which is the entire point for disk space. It goes from a 494 GB volume down to a single file. And making the numbers agree with macOS turned out to be harder than measuring them. macOS reports purgeable space — snapshots it will reclaim under pressure — so if you sum file sizes and ignore it, your total disagrees with About This Mac. When someone sees two numbers they believe Apple's, correctly. The categories are disjoint buckets that reconcile to the volume's real capacity. It's free and MIT because I wanted the four apps to exist, not to sell a fifth.

Helm - Fifteen Mac utilities in one window. Free and open source.

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