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:
- Force quit compressor daemons:
killall Compressor && killall qmasterd
- Delete stale batch spool files:
rm -rf ~/Library/Application Support/Compressor/Storage/*
- Relaunch Apple Compressor and submit batch job.
Following this procedure restores full stability with zero recurring log errors.
MacBook Pro 16″ M3 Max (128GB) | iPad Pro 11″ M4 (Apple Pencil Pro) | Lyon, FR
Apple Certified Support Professional (ACSP) | Computer Science & Machine Learning Student
