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[Solved] MacBook Pro 16″ M2 Max encountering Compressor Batch Transcode Queue Stuck on ‘Waiting’ after update (macOS Sonoma 14.6)

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Home › Forums › Logic Pro, Final Cut Pro & Pro Apps › [Solved] MacBook Pro 16″ M2 Max encountering Compressor Batch Transcode Queue Stuck on ‘Waiting’ after update (macOS Sonoma 14.6)

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  • November 15, 2026 at 2:05 am #17180
    Katherine Mendoza
    Community Contributor
    Diagnostic Hardware Specs: MacBook Pro 16″ M2 Max | OS Version: macOS Sonoma 14.6 | Archive Source: Apple Support Community #256456672

    I am running into a persistent issue on my MacBook Pro 16″ M2 Max running macOS Sonoma 14.6.
    Whenever the machine encounters Stale background Qmaster / Apple Qconsumer cluster lockfile, the following diagnostic log appears in Console:

    Compressor: [qmaster] Service cluster lockfile present: refusing new batch job submission

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

    Mac Studio M1 Max (32GB) | Dual Dell UltraSharp 4K | Logitech MX Master 3S | Philadelphia, PA
    Product Designer & Design Systems Lead | "Verified Apple Discussions Archive"
    November 15, 2026 at 2:05 am #17181
    Noah Snyder
    Certified Tech (Lvl 5)
    Apple Recommended / Verified Community Solution
    This canonical solution was verified and marked as solved in the Apple Support Community archive.

    Terminating orphaned qmaster processes and clearing compressor spool storage.

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

    1. Force quit compressor daemons: 
      killall Compressor && killall qmasterd
    2. Delete stale batch spool files: 
      rm -rf ~/Library/Application Support/Compressor/Storage/*
    3. Relaunch Apple Compressor and submit batch job.

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

    iPad Pro 13″ M4 (Magic Keyboard + Cellular) | iPhone 15 Pro | Perth, AU
    Apple Certified Support Professional (ACSP) | Digital Nomad & Travel Filmmaker
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