RenderFocus Icon

Take Full Control of Apple Silicon.

macOS distributes CPU power fairly. RenderFocus plays favorites. Force background applications into Efficiency Cores and dedicate maximum performance exclusively to your active workflow.

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Requires macOS 13.0+
Optimized for M-series architectures

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Not all cores are
created equal.

0
P-Cores Locked
0
Threads Restricted
0
Faster Compilation
Zero
Data Collected
Precision

The Art of Focus.

Interaction meets hardware logic. Toggle the focus mode to see the XNU scheduler route system threads in real-time.

Kernel Thread Router
XNU
Mach_Kernel
P-Cores
E-Cores
THREADS_PRIORITIZED_NODES_0_1
Control Interface
Logo
RenderFocus
Focus Mode Active
Real-time Load
Applications
🎬
Final Cut Pro
PID: 4829
🎯
🛠️
Xcode
PID: 9211

Defeat Background Noise

Electron apps, sync engines, and browser tabs constantly interrupt your P-Cores. RenderFocus physically restricts their threads to the E-Core cluster, eliminating micro-stutters.

Workflow Priority

Whether you are compiling massive codebases in Xcode, rendering 3D scenes in Blender, or exporting 8K timelines in Final Cut Pro, RenderFocus ensures your primary tool gets undivided attention.

1-Click Hardware Lock

No complex terminal commands or endless configuration files. Select your target application, hit focus, and watch the XNU scheduler obey your command in real-time.

Interactive

Pick Your Priority.

Select an application and watch RenderFocus redistribute CPU resources in real time.

RF RenderFocus
Select an app to focus
P-Cores: balanced 0 threads restricted
Audience

Built for Professionals.

Developers

Compile Faster.

Lock Xcode or Docker to P-Cores. Prevent background sync engines and browser tabs from extending your build times.

Creators

Uninterrupted Renders.

Keep Blender, Final Cut, or Premiere Pro fed with pure Firestorm power. Background apps get relegated to E-Cores.

Audio Pros

Zero Dropouts.

Give your DAW absolute priority. Eliminate “System Overload” errors caused by background micro-stutters.

Visualization

Visualize the Scheduler.

See how RenderFocus forcefully evicts background threads from your Performance Cores.

Before RenderFocus
P-Cores
E-Cores
After RenderFocus
P-Cores
E-Cores
Interface

Lives in Your Menu Bar.

One click away. Always watching, never in the way.

Logo
RenderFocus
Focus Mode Active
Session Details
Target Application Final Cut Pro
Process ID PID: 4192
P-Core Allocation 8 / 8 Locked
Background Threads 142 → E-Cores
Core Status
Security

Privilege-Separated by Design.

Three layers of isolation ensure your system stays secure while RenderFocus operates at kernel depth.

App UI (Sandbox)

Runs strictly in user-space with standard macOS sandbox protections.

XPC Daemon (Root)

Installed securely via Apple’s SMAppService. Requires one-time Touch ID approval.

Darwin Kernel

Safely invokes taskpolicy(2) to manipulate QoS classes at the lowest hardware level.

Benchmarks

The Mathematics of Focus.

WebKit Compilation Time (Xcode)

Without
14m 20s
With RF
11m 45s

Heavy 3D Render (Blender)

Without
8m 10s
With RF
6m 55s

Benchmarked on M3 Max · 16-core CPU · 128GB Unified Memory

Engineered for Performance.

Low-level Darwin Integration

XNU Kernel Integration

RenderFocus directly interfaces with the Darwin kernel's taskpolicy(2) API, modifying the Quality of Service (QoS) classes and thread priorities at the lowest possible system level.

Secure Daemon Architecture

Built on a robust, privilege-separated XPC daemon via SMAppService. Background restriction is executed with root authority without exposing primary sessions.

Frequently Asked Questions

Why RenderFocus require biometric authentication (Touch ID)?

Modifying thread allocations across different user processes requires kernel-level privileges. We use Apple's secure SMAppService to authorize these changes safely.

Will this cause my Mac to overheat?

No. RenderFocus manages thread scheduling, not hardware voltage. Apple's built-in thermal throttling and power management remain 100% active and untouched.

How is this different from just closing background apps?

Closing apps disrupts your workflow. RenderFocus allows you keep your background apps open—they just run silently on the Efficiency Cores without stealing resources.

Does it work on Intel-based Macs?

No. RenderFocus is strictly designed for the asymmetric core architecture (Performance & Efficiency clusters) unique to Apple Silicon (M-series) processors.

Is my data collected?

Absolutely not. RenderFocus operates entirely offline. There are no telemetry trackers, no analytics, and no phoning home.