What is MacPilot and who is it designed for?

MacPilot is a high-performance native macOS system utility and storage intelligence platform engineered in pure Swift for developers, software engineers, AI practitioners, and macOS power users. Unlike Electron-wrapped cleaners that consume 400MB+ of RAM, MacPilot runs at under 40MB of memory, utilizing native APFS filesystem APIs and POSIX process controls to reclaim disk space, audit listening ports, and optimize development environments.

How does MacPilot's APFS Copy-on-Write (CoW) deduplication work?

Unlike traditional cleaners that force you to delete duplicate files, MacPilot uses Apple's native APFS Darwin system call clonefile(2). It replaces duplicate files with APFS clones that share exact physical disk blocks on SSD. Both files continue to exist at their original paths without consuming double the physical storage, freeing gigabytes instantly with zero risk of data loss.

How does MacPilot inspect and prune Local AI LLM models?

MacPilot includes a dedicated Local AI Model Registry that auto-discovers models across Ollama, LM Studio, Hugging Face Hub, Apple MLX, and ComfyUI. It parses binary GGUF and Safetensors headers directly to identify model architecture, parameter count (7B, 14B, 70B), and quantization levels, alerting users when identical model weights are stored redundantly across hubs.

How does MacPilot kill stubborn listening ports like localhost:3000 without crashing?

MacPilot performs deep POSIX process tree resolution. When terminating a process holding a TCP port (e.g. Next.js, Node, Python, or Go), MacPilot detects the entire ancestry hierarchy (e.g. zsh ➔ npm run dev ➔ next-server), transmits graceful SIGTERM across the process group, and escalates to SIGKILL only if unresponsive, ensuring that no zombie child processes continue clinging to the socket.

Why is MacPilot faster and lighter than CleanMyMac or DaisyDisk?

MacPilot is written 100% in native Swift with zero Electron, Node.js runtime, or Chromium dependencies. It boots in under 180 milliseconds, consumes less than 40MB of RAM, and traverses APFS volumes using direct low-level filesystem calls rather than slow user-space recursion.

Does MacPilot delete source code or Git repositories?

No. MacPilot is specifically engineered to protect developer code. It identifies only safe, disposable build artifacts—such as Xcode DerivedData, npm package tarballs, Docker dangling layers, and stale simulator runtimes—while strictly preserving git repos, unstaged code, and configuration files.

What are the macOS system requirements for MacPilot?

MacPilot requires macOS 14.0 (Sonoma) or macOS 15.0 (Sequoia) or newer. It is packaged as an Apple Universal binary with native ARM64 support for Apple Silicon (M1, M2, M3, M4 series) and x86_64 for Intel Macs.

What are MacPilot's pricing plans and Founder privileges?

MacPilot offers a perpetual Free Starter tier, a Pro Annual subscription at ₹1,499/year, a Lifetime perpetual license at ₹3,999, and an exclusive Founder Edition at ₹1,999 one-time (strictly limited to the first 1,000 customers with numbered badges and roadmap governance).

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Developer Toolchain

Is Xcode DerivedData Safe to Delete? (Yes, and Here's How)

The Silo Team · 5 min read · September 19, 2026

Is DerivedData Safe to Delete?

Yes. 100% safe. DerivedData is Xcode's build cache directory. It stores compiled intermediates, indexes, and diagnostic logs. Deleting it forces Xcode to recompile from scratch, which takes longer on the next build — but nothing is permanently lost.

Where Is DerivedData?

~/Library/Developer/Xcode/DerivedData

This directory typically contains one folder per project you've ever built. Each folder can be 2–8 GB. Old projects accumulate here indefinitely.

Other Xcode Directories Worth Cleaning

iOS/watchOS/tvOS Simulator Runtimes (~10–30 GB)

# List all simulators
xcrun simctl list

# Delete simulators that are no longer supported by Xcode
xcrun simctl delete unavailable

DeviceSupport Symbol Caches (~5–20 GB)

~/Library/Developer/Xcode/iOS DeviceSupport
~/Library/Developer/Xcode/watchOS DeviceSupport

These contain debug symbol mappings for every device you've connected. Safe to delete; Xcode redownloads as needed.

How MacPilot's Xcode Reclaimer Works

MacPilot's Developer Center runs a targeted scan of all Xcode directories and shows you exact sizes before deletion. It runs xcrun simctl delete unavailable automatically and flags old DeviceSupport entries older than 6 months as safe candidates.

See it on your own Mac.

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Keep reading

Storage & Disk Space · 10 min read · September 20, 2026

How to Free Up Disk Space on Mac: The Developer's Complete Guide

From APFS clone-aware deduplication to DerivedData nukes and Docker.raw shrinking — the most complete storage reclaim guide for macOS engineers.

Ports & Processes · 5 min read · September 18, 2026

How to Kill a Process on a Port on Mac (localhost:3000, 5432, 8080)

The right way to find and kill whatever is listening on localhost:3000, 8080, or 5432 on macOS — using lsof, process tree resolution, and MacPilot.