Lightweight Always‑on‑Top Utility for macOS
TopWindow is engineered for efficiency. With minimal memory usage, negligible CPU impact, and optimized performance, it delivers powerful window management without slowing down your Mac.
Why Performance Matters for Always‑on‑Top
Your Mac Deserves Better
Many utility apps become resource hogs, consuming precious system resources and slowing down your Mac. TopWindow takes the opposite approach - maximum functionality with minimal impact.
Whether you're running on an older MacBook or the latest Mac Studio, TopWindow ensures your system resources remain available for the work that matters most.
Heavy Utilities
Consume 100MB+ RAM, cause fan noise, drain battery, and slow down other applications.
TopWindow
Under 20MB RAM, silent operation, excellent battery life, and seamless performance.
Performance Breakdown
Disk Space
Compact app bundle that installs in seconds and takes minimal storage space.
Memory Usage
Efficient memory management keeps RAM usage minimal, even with multiple pinned windows.
CPU Usage
Negligible processor usage means no impact on performance or system responsiveness.
Battery Impact
Optimized for energy efficiency with zero measurable impact on battery life.
How We Achieve Lightweight Performance
Native Swift Implementation
Built entirely in Swift using native Apple frameworks. No heavyweight cross-platform libraries or unnecessary dependencies that bloat the app size and memory usage.
Efficient Event Handling
Uses macOS's native notification system to monitor window changes. The app only processes events when needed, remaining dormant during idle periods.
Smart Memory Management
Automatic memory cleanup and efficient data structures ensure TopWindow's memory footprint remains constant regardless of how many windows you pin.
Background Optimization
Designed to run efficiently in the background without polling or continuous processing. TopWindow only activates when you interact with it or when window states change.
Performance Comparison
| App | App Size | RAM Usage | CPU Usage | Battery Impact |
|---|---|---|---|---|
| TopWindow | 4.3MB | <20MB | <1% | None |
| Typical Window Manager A | 45MB | 120MB | 3-5% | High |
| Typical Window Manager B | 78MB | 95MB | 2-4% | Medium |
| Heavy Productivity Suite | 250MB+ | 400MB+ | 8-12% | Very High |
* Performance measurements taken on a MacBook Pro M2 with 16GB RAM running macOS 14
Real-World Benefits
Longer Battery Life
Zero battery impact means your MacBook lasts longer on a single charge, perfect for all-day productivity sessions.
Silent Operation
No fans spinning up, no heat generation. TopWindow runs so efficiently your Mac stays quiet and cool.
Instant Startup
Launches in milliseconds and is immediately ready to use. No splash screens or loading delays.
More Resources for Other Apps
Your RAM and CPU remain available for demanding applications like video editing, development tools, and creative software.
Works on Older Macs
Runs perfectly on older MacBooks with limited RAM, extending the useful life of your hardware.
Set and Forget
Install once and it works reliably in the background without maintenance, updates, or configuration.
Performance Questions
Will TopWindow slow down my older Mac?
Not at all! TopWindow is specifically designed to run efficiently on older hardware. With under 20MB RAM usage, it works great even on 8GB systems from 2015 and newer.
How does memory usage scale with pinned windows?
TopWindow's memory usage remains virtually constant regardless of how many windows you pin. Each pinned window adds less than 1KB to memory usage thanks to efficient data structures.
Does it affect gaming or video performance?
No impact whatsoever. TopWindow uses less than 1% CPU and doesn't interfere with graphics-intensive applications. Your games and videos will run exactly as before.
Why is TopWindow smaller than other similar apps?
We built TopWindow from the ground up using only native macOS frameworks. No bloated cross-platform libraries, no unnecessary features - just efficient, focused functionality.
Experience Lightweight Performance
Try TopWindow and feel the difference of truly efficient software that respects your Mac's resources.