✨ PureGlass

The native, real Liquid Glass Mac cleaner + system monitor — free, private, open source.

PureGlass finds what wastes your space, shows you every single file path before touching it, and never sends a byte to the internet. It also packs a live system monitor — CPU, memory, temperature and fan control (the job of Stats + Macs Fan Control, built in). One app, no telemetry. Built from scratch in SwiftUI for macOS 26 (Tahoe) with Apple's genuine Liquid Glass material — not a glassmorphism fake.

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Why PureGlass?

Most Mac cleaners are either expensive (CleanMyMac is $39.95/yr), closed-source with telemetry, or CLI-only. PureGlass was built on three principles:

• 🔒 Privacy first — 100% offline. No telemetry, no accounts, no network access. Ever.
• 🪟 Real Liquid Glass — the genuine macOS 26 .glassEffect() material + a fully transparent menu-bar panel.
• 👁️ Total transparency — you see the exact path, size and risk level of everything before it's removed, and every deletion goes to the Trash (recoverable), shown live as it happens.

Honest by design. PureGlass tells you the truth: which files are safe, which are risky, and which system data simply cannot be deleted by any tool (it shows you those too, with their sizes).

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Screenshots

🗂️ System Data — finally, what's actually inside it

macOS hides tens of GB under a mysterious "System Data" category. PureGlass breaks it down by risk level (🟢 safe · 🟡 caution · 🔴 risky), pre-selects nothing (you choose), and even shows the undeletable system areas with their real sizes.

🛡️ Security Scan — code-signature malware detection

Uses the KnockKnock methodology: enumerates persistence locations (launch agents/daemons, ~/.zshrc, cron, emond, hosts) and verifies the code signature of every persistent executable. Apple/Developer-ID signed items are trusted; unsigned / ad-hoc / broken-signed items are flagged. 100% local.

🗺️ Disk Map — full-disk heatmap treemap

A squarified treemap where box size = disk usage and color = how full (🔴 huge → 🟢 small). Click any folder to drill in. A location picker jumps to the whole disk (/), Homebrew, /Library/Developer, and more — so you can actually find the 60 GB hiding in your Xcode simulators. (CleanMyMac has no treemap.)

🧹 App Uninstaller — with leftover detection

Trashing an app isn't enough — it leaves caches, preferences and container data behind. PureGlass finds the app and all its leftovers by bundle ID, and shows you exactly what it will remove.

📊 System Monitor — live CPU, memory, temperature & fan control

Reads directly from the SMC (System Management Controller) and Mach APIs: a live CPU usage graph with System/User breakdown, memory pressure (matches Activity Monitor), thermal state, CPU/battery temperature, and fan RPM — refreshed live. On M1/M2 you can also set a manual fan speed (one password prompt, always reversible). No telemetry, no cloud.

🔁 Duplicate Finder · 🧰 Maintenance · 🙈 Browser Privacy

• Duplicate Finder groups files by content hash (SHA-256, size-pre-filtered) so renamed copies are caught; keeps one, you trash the rest.
• Maintenance runs the familiar OnyX-style system tasks (flush DNS, reindex Spotlight, rebuild Launch Services, reset the Quick Look cache, purge RAM, clear font cache…) — admin ones via a single password prompt.
• Browser Privacy clears cache / history / cookies for Safari, Chrome, Firefox, Brave and Edge — to the Trash.

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How PureGlass compares

	PureGlass	CleanMyMac	Mac Sai	Pearcleaner	PureMac	OnyX
Price	Free	$39.95/yr	Free	Free	Free	Free
Open source	✅ MIT	❌	✅ BSD-3	✅	✅ MIT	❌
Telemetry	✅ None	⚠️ Yes	None	None	None	None
Real Liquid Glass UI (macOS 26)	✅ Only PureGlass	❌	❌	❌	❌	❌
Transparent menu-bar panel + live disk	✅	menu only	✅	❌	❌	❌
Live system monitor (CPU/temp/fan, SMC)	✅	❌	✅	❌	❌	❌
Fan control (manual RPM, M1/M2)	✅	❌	❌	❌	❌	❌
Smart Scan (one-click)	✅	✅	✅	❌	partial	❌
System Junk	✅	✅	✅	—	✅	limited
System Data breakdown + undeletable sizes	✅ Unique	❌	❌	❌	❌	❌
Malware scanner (code-signature)	✅	✅	✅	❌	❌	❌
Uninstaller w/ leftover detection	✅	✅	✅ 10-lvl	✅	❌	❌
Disk treemap visualizer	✅ full-disk	❌	✅	❌	❌	❌
Live per-file deletion log	✅	❌	✅	❌	❌	❌
Risk classification + manual control	✅	partial	✅	✅	—	—
Trash-first (recoverable)	✅	✅	✅	✅	✅	—
Time Machine snapshot mgmt	✅	✅	✅	❌	❌	✅
Duplicate finder (content-hash)	✅	✅	✅	❌	❌	❌
Maintenance scripts	✅	✅	✅	❌	❌	✅ strong
Browser privacy cleaner	✅	✅	✅	❌	❌	—

Where PureGlass leads: the only one with real Liquid Glass, a fully transparent menu-bar panel, an honest System Data breakdown (including the undeletable part), a full-disk treemap (CleanMyMac has none), code-signature malware detection, and a live per-path deletion log. On top of cleaning it adds a live system monitor with fan control (CPU/temp/RAM + manual fan RPM on M1/M2) — folding in what you'd otherwise pay for with Stats, iStat Menus or Macs Fan Control — all free, offline and open source, with no telemetry. It also matches the paid tools on duplicate finding, maintenance scripts and browser-privacy cleaning. (Universal-Binary thinning is intentionally omitted — rewriting signed app binaries breaks their code signature and risks breaking the app.)

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Features

• Smart Scan — caches, logs and temp files, one click, nothing deleted without your OK.
• System Data — risk-classified breakdown of the giant "System Data" category, fully manual selection, plus a read-only list of the undeletable system areas with sizes, plus Time Machine snapshot management.
• Security Scan — KnockKnock-style persistence + code-signature malware detection, fully offline.
• App Uninstaller — removes apps with all their leftovers (caches, prefs, containers, logs).
• Disk Map — full-disk squarified treemap heatmap with drill-down and a quick location picker.
• Menu-bar panel — a transparent Liquid Glass panel with live disk metrics (refreshed every second) and quick actions; a "System Settings → Storage" shortcut.
• Duplicate Finder — content-hash (SHA-256) duplicate detection in any folder; keep one, trash the rest.
• Maintenance — OnyX-style system tasks (DNS flush, Spotlight reindex, Launch Services, Quick Look cache, purge, fonts).
• Browser Privacy — clear cache/history/cookies for Safari, Chrome, Firefox, Brave, Edge.
• System Monitor — live CPU (per-core), memory pressure, thermal state, CPU/battery temperature and fan RPM, read from the SMC + Mach APIs every second. No root.
• Fan control (M1/M2) — set a manual fan RPM via a bundled root helper (one password prompt). Apple blocks fan writes on M3+, so it's read-only there — stated honestly in the UI.
• Live deletion log — every path scrolls by as it's trashed.
• Risk badges everywhere (🟢 safe · 🟡 caution · 🔴 risky) and a confirmation prompt before any risky delete.
• Deep clean (optional) — system caches/logs via a single admin-password prompt; system items are validated against a stricter safety guard and the command is injection-safe.

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Requirements

• macOS 26.0+ (Tahoe) — required for the Liquid Glass material
• Apple Silicon
• To build: Xcode 26+ and XcodeGen (brew install xcodegen)

The UI is currently in Turkish; localization PRs are welcome.

Build & Run

git clone https://github.com/GRJY/PureGlass.git
cd PureGlass
xcodegen generate          # generate PureGlass.xcodeproj from project.yml
open PureGlass.xcodeproj    # then ⌘R in Xcode

# or a packaged .dmg:
./scripts/build-release.sh # → build/PureGlass.dmg

The app is non-sandboxed (required for Full Disk Access) and distributed outside the App Store. Because it is not notarized (no paid Apple Developer account), the first launch may need right-click → Open.

Architecture

Sources/
  App/            Entry point, transparent window, menu-bar status panel
  DesignSystem/   Liquid Glass components (GlassCard, RiskBadge, ProgressRing, LiveLogPanel…)
  Features/       View models + screens (Smart Scan, System Data, Security, Uninstaller, Disk Map…)
  Core/           = PureGlassKit framework (UI-independent, unit-tested):
    LocationsDatabase     single source of truth for scan paths (category + risk)
    SafetyGuard           last-line delete guard (blocklist + symlink/TOCTOU)
    ScanEngine            concurrent, cancellable scanning
    CleaningEngine        trash-first deletion with live events
    CodeSignatureInspector  Security-framework signing verification (KnockKnock)
    ThreatScanner         persistence + malware heuristics
    DiskMapScanner / TreemapLayout   squarified treemap
    AppUninstaller        app + leftover discovery
    DuplicateFinder       content-hash duplicate detection
    BrowserPrivacyScanner browser cache/history/cookie locations
    SMCReader             SMC sensor reads (temperature, fan) via raw IOKit
    SystemMetrics         CPU usage + memory via Mach APIs
Tests/            79 unit tests (safety, scan, clean, signing, treemap, duplicates, SMC, metrics…)

Safety & Privacy

• Never touched: /System, /usr, /bin, Apple apps, anything SIP-protected.
• Every delete is validated by SafetyGuard (blocklist + safe-root + symlink/TOCTOU) immediately before removal.
• User files go to the Trash (recoverable). Root-owned system caches are permanently removed only after an explicit confirmation + admin password.
• No telemetry, no network, no accounts. Everything stays on your Mac.

Honest limits

• macOS SIP-protected system files cannot be deleted by any tool (not even with Full Disk Access). PureGlass shows these as read-only "undeletable system data" with sizes rather than pretending it can remove them.
• Not notarized (no paid Apple Developer account) → manual first-launch approval.

Roadmap

• English / multi-language localization · simulator-runtime cleanup via simctl · scheduled background scans · per-core P/E labelling.

License

MIT © Giray Akbulut

_{Built with SwiftUI for macOS 26 · 100% offline · no telemetry}