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Reply To: [Solved] MacBook Pro 16″ M3 Max encountering Local LLM / MLX Framework Unified Memory Allocation Out-of-Memory Panic after update (macOS Sonoma 14.7)

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Home › Forums › Apple Silicon, Terminal & Developer Tools › [Solved] MacBook Pro 16″ M3 Max encountering Local LLM / MLX Framework Unified Memory Allocation Out-of-Memory Panic after update (macOS Sonoma 14.7) › Reply To: [Solved] MacBook Pro 16″ M3 Max encountering Local LLM / MLX Framework Unified Memory Allocation Out-of-Memory Panic after update (macOS Sonoma 14.7)

November 14, 2026 at 12:47 pm #4441
Rachel Kim
Lead Moderator
Apple Recommended / Verified Community Solution
This canonical solution was verified and marked as solved in the Apple Support Community archive.

Increasing sysctl wired memory limit and quantizing model weights for MLX runtime.

Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

  1. Increase sysctl wired unified memory limit: 
    sudo sysctl iogpu.wired_mem_limit=180000
  2. Load models using 4-bit or 8-bit quantization (e.g. mlx-lm.generate --model mlx-community/Llama-3-70B-4bit).
  3. Flush system unified cache before heavy inference passes: 
    sudo purge

Following this procedure restores full stability with zero recurring log errors.

Apple Certified Support Professional (ACSP)
Cupertino, CA | "Precision Apple Diagnostics"