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[Solved] How to fix Logic Pro ‘System Overload. The audio engine was not able to process all required data’ caused by CoreAudio thread scheduling buffer underrun with third-party AU plugins (-10011) on MacBook Pro 14″ M3 Pro

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Home › Forums › Logic Pro, Final Cut Pro & Pro Apps › [Solved] How to fix Logic Pro ‘System Overload. The audio engine was not able to process all required data’ caused by CoreAudio thread scheduling buffer underrun with third-party AU plugins (-10011) on MacBook Pro 14″ M3 Pro

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  • November 14, 2026 at 11:19 pm #14387
    Diane Patel
    Senior Specialist (Lvl 8)
    Diagnostic Hardware Specs: MacBook Pro 14″ M3 Pro (36GB) | OS Version: macOS Sonoma 14.7 + Logic Pro 10.8.1 | Archive Source: Apple Support Community #256598857

    I am running into a persistent issue on my MacBook Pro 14″ M3 Pro (36GB) running macOS Sonoma 14.7 + Logic Pro 10.8.1.
    Whenever the machine encounters CoreAudio thread scheduling buffer underrun with third-party AU plugins (-10011), the following diagnostic log appears in Console:

    CoreAudio: [com.apple.coreaudio] Logic Pro audio processing thread #4 exceeded buffer latency budget (-10011)

    I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

    MacBook Pro 14″ M4 Pro (48GB) | iPhone 15 Pro | iPad Air M2 | Calgary, AB
    iOS / Swift Engineer | "Verified Apple Discussions Archive"
    November 14, 2026 at 11:19 pm #14388
    Jessica James
    Senior Specialist (Lvl 8)
    Apple Recommended / Verified Community Solution
    This canonical solution was verified and marked as solved in the Apple Support Community archive.

    Increasing I/O buffer sample size, maximizing processing threads, and freezing high-CPU synth tracks.

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

    1. Navigate to Logic Pro > Settings > Audio > Devices and set I/O Buffer Size to 512 samples (or 1024 for mixing).
    2. Set Processing Threads from ‘Automatic’ to the maximum available performance cores.
    3. Enable Track Freeze on tracks with resource-heavy synthesizers or convolution reverbs.

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

    Apple Vision Pro (1TB) | Mac mini M4 Pro (48GB) | Studio Display | Rome, IT
    Apple Certified Support Professional (ACSP) | visionOS Spatial Computing Developer
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