MacSentinel
A native Swift macOS system monitoring tool offering a memory treemap, per-core CPU data, network throughput, and app cleanup, with core features free.
About MacSentinel
MacSentinel is a macOS system monitoring tool written in native Swift, supporting Apple Silicon (M1–M4) and Intel Macs. It shows a real physical RSS memory treemap, per-core CPU data broken down by performance and efficiency cores, per-process network throughput, and 90-second rolling history charts; it also offers disk space analysis and cleanup of leftover files in ~/Library. The core dashboard is free to use, while advanced features require a one-time Pro Lifetime license. The download page lists the installer at 14.5 MB as a universal binary, requiring macOS 14 Sonoma or later.
Best for
Best use cases
Check an app's real memory usage to determine whether there is a memory leak or runaway threads
Find out which process is consuming network bandwidth
Analyze where disk space went and clean up app leftovers in ~/Library
Observe CPU load separately on performance and efficiency cores on an Apple Silicon Mac
Compare before choosing
According to the official comparison page, MacSentinel offers a physical RSS memory treemap, per-core CPU microsecond deltas (performance/efficiency cores), per-process network throughput, 90-second rolling history charts, and memory leak and runaway thread detection — none of which are provided by the built-in macOS Activity Monitor.
Features
Memory Treemap
View each app's physical RSS memory usage with a 90-second rolling history chart on the dashboard.
Per-Core CPU Monitoring
Displays microsecond-level deltas separately for Apple Silicon's performance and efficiency cores, with memory leak and runaway thread detection.
Network Telemetry
View network throughput per process to find out which app is using the network.
Storage Analysis & Cleanup
A real-time disk treemap shows how space is distributed, letting you precisely clean up app leftovers in ~/Library.
Pros
- Written in native Swift, optimized for Apple Silicon (M1–M4), with Intel Mac support as well
- Provides granular information such as a physical RSS memory treemap, per-core CPU data, and per-process network throughput
- Pro version is a one-time purchase with no monthly subscription
- The official site states it contains no telemetry tracking and offers a 30-day money-back guarantee