6f60dd7ad8
The window left open all day grew the app by ~360 MB in 24 h even after the .tabItem fix. Isolating each piece in lab builds showed the growth is the sum of several small framework leaks on macOS 26.6 that fire on every view update: SwiftUI Table cell updates, AppKit text-cell KVO dependencies (NSKeyValueDependency) and an ObservationRegistrar created inside DesignLibrary. With the window closed every counter stayed flat; minimized or fully covered, SwiftUI kept updating and kept leaking. - WindowVisibility tracks whether any TopManager window is on screen (occlusion state; the status item's host window is ignored). - SystemMonitor records into an always-current LiveState and only mirrors it into the @Published properties while something is visible. Resuming publishes everything at once, so views catch up immediately. Metrics history, alerts and the menu bar keep running while paused. - MenuBarStatus carries the pre-formatted menu-bar strings, republished only when the visible text changes. - AlertCenter assigns healthScore/diagnosis only when they change. - Monitoring now starts in applicationDidFinishLaunching instead of the main window's onAppear, so it also runs when the app launches with no window (state restoration after the window was closed). Also fixes a visible bug: ProcessMonitor's lightweight refresh (2 of every 3 fetches) emitted 0 for memory, CPU and threads instead of the last known values, so ~90% of rows showed "Zero KB" most of the time. Verified in an isolated lab instance: minimized or covered, all leak counters stay flat while the menu-bar title keeps updating; a partially visible window updates every tick. Growth while the window is actually visible (~190 KB/min) is unchanged — those leaks are in Apple's frameworks. 58/58 tests pass, including a regression test that fails on the old code (472 of 487 own processes reported 0 memory). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
TopManager
A native macOS system monitor application built with SwiftUI. TopManager provides real-time monitoring of system resources including processes, applications, CPU, memory, GPU, storage, and network.
Download
⬇️ Download TopManager 1.0 (.dmg)
Signed with a Developer ID and notarized by Apple — it opens without Gatekeeper warnings. Open the DMG and drag TopManager to your Applications folder. All releases.
Screenshots
Processes
Apps
Performance - CPU
Performance - Memory
Performance - Network
Power & Storage
Features
Processes Tab
- View all running processes with CPU, memory, thread, energy-impact, and per-process disk I/O information
- Sort by any column (name, PID, CPU/Core, CPU/Total, Energy, memory, Disk I/O, threads, user, state)
- Process states: Running, Sleeping, Stopped, Zombie
- Context menu to terminate, force kill, suspend, or resume processes
- Deep-dive inspector (double-click / ⌘I): full executable path, launch arguments, open-file count, disk totals, energy, parent PID, Reveal in Finder
- Search processes by name or PID
Apps Tab
- View running user-facing applications
- Shows app icons, CPU/memory usage, and bundle identifiers
- Quick actions: Activate, Hide, Quit, Force Quit
- Copy bundle ID to clipboard
Performance Tab
- Real-time CPU usage graphs (global and per-core)
- Selectable time range (Live / 5m / 30m / 1h / 24h) backed by persistent history
- Memory usage visualization with donut chart
- Network throughput monitoring
- Support for Apple Silicon P-cores and E-cores
Power & Storage Tab
- System Health score (0–100) with plain-language diagnosis of what's wrong
- Recent Alerts inbox
- Battery & Power: charge, health (cycle-adjusted), cycle count, condition, temperature, power draw, time remaining, adapter wattage (via IOKit)
- System status: macOS version, uptime, thermal state
- CPU and GPU core counts
- GPU memory/VRAM usage
- Storage volumes with usage bars
- Network interface statistics
Proactive monitoring
- Alerts engine with native macOS notifications on sustained high CPU, critical memory pressure, disk almost full, thermal throttling, runaway processes, and low battery — de-duplicated so you're never spammed
- Persistent metric history stored to disk; trends survive restarts
Menu Bar
- Configurable menu-bar metric (CPU % / Memory % / Health / Download)
- Dropdown with live CPU/memory/network/GPU/battery, System Health score, and Top CPU Consumers with one-click quit
Settings (⌘,)
- Launch at login (SMAppService)
- Adjustable refresh interval (1–30 s)
- Notification toggle and alert thresholds (CPU, disk, low battery)
Requirements
- macOS 13.0 or later
- Xcode 15.0 or later (for building)
Building
-
Clone the repository:
git clone https://github.com/hariel1985/TopManager.git -
Open
TopManager.xcodeprojin Xcode -
Build and run (⌘R)
License
This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.
Testing
Logic is covered by an XCTest suite (TopManagerTests, 55 tests) run via
scripts/test.sh test. The full manual + automated process is documented in
docs/TESTING.md, and the product direction in
docs/VALUE_PLAN.md.
Acknowledgments
Built with SwiftUI and native macOS APIs including:
libproc/rusage_infofor process information, disk I/O and energy signalsIOKitfor GPU, battery (AppleSmartBattery) and hardware monitoringMetalfor GPU detectionSystemConfigurationfor network monitoringUserNotificationsfor proactive alertsServiceManagement(SMAppService) for launch-at-login- Swift
Chartsfor time-series visualization