Apple Recommended / Verified Community Solution
This canonical solution was verified and marked as solved in the Apple Support Community archive.
Purging generated project render files and disabling Optical Flow on speed-ramped clips.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- In Final Cut Pro, select your Project in the browser, go to File > Delete Generated Project Files, and select Delete Render Files (All).
- Select any re-timed/speed-ramped clips, open the Video Inspector, and change Video Quality from Optical Flow to Frame Blending.
- Export destination should be an internal APFS location first before transferring to external storage.
Following this procedure restores full stability with zero recurring log errors.
Mac mini M2 (24GB) | Apple Technician Guide Hub | Fluke 87V DMM | Glasgow, UK
Apple Certified Support Professional (ACSP) | Apple Certified Service Technician (ACiT / ACSP)
