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Reply To: [Solved] Mac Studio M1 Max Final Cut Pro ProRes 422 HQ Export Hanging at 68% (macOS Sonoma 14.7 + FCP 10.8) – Verified Troubleshooting

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Home › Forums › Logic Pro, Final Cut Pro & Pro Apps › [Solved] Mac Studio M1 Max Final Cut Pro ProRes 422 HQ Export Hanging at 68% (macOS Sonoma 14.7 + FCP 10.8) – Verified Troubleshooting › Reply To: [Solved] Mac Studio M1 Max Final Cut Pro ProRes 422 HQ Export Hanging at 68% (macOS Sonoma 14.7 + FCP 10.8) – Verified Troubleshooting

November 15, 2026 at 12:34 am #15663
Owen Parker
Apple Master (Lvl 10)
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:

  1. In Final Cut Pro, select your Project in the browser, go to File > Delete Generated Project Files, and select Delete Render Files (All).
  2. Select any re-timed/speed-ramped clips, open the Video Inspector, and change Video Quality from Optical Flow to Frame Blending.
  3. 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.

iPhone 15 Pro | Apple Watch Series 10 | Denver, CO
Apple Certified Support Professional (ACSP) | Field Photographer