Skip to content
MappleCare Community ↗

MappleCare Community

[Solved] Mac Studio M2 Ultra Final Cut Pro ProRes 422 HQ Export Hanging at 68% (macOS Sonoma 14.7 + FCP 10.8) – Verified Troubleshooting

Find answers from other Apple users or start a discussion about your device.

All Forum Rooms

Home › Forums › Logic Pro, Final Cut Pro & Pro Apps › [Solved] Mac Studio M2 Ultra Final Cut Pro ProRes 422 HQ Export Hanging at 68% (macOS Sonoma 14.7 + FCP 10.8) – Verified Troubleshooting

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • November 15, 2026 at 12:30 am #15588
    Leo Bell
    Community Contributor
    Diagnostic Hardware Specs: Mac Studio M2 Ultra (128GB) | OS Version: macOS Sonoma 14.7 + FCP 10.8 | Archive Source: Apple Support Community #256503698

    I am running into a persistent issue on my Mac Studio M2 Ultra (128GB) running macOS Sonoma 14.7 + FCP 10.8.
    Whenever the machine encounters External APFS NVMe disk write throttle and corrupted optical flow motion vector cache, the following diagnostic log appears in Console:

    Final Cut Pro: [RenderEngine] OpticalFlow optical motion frame render timeout at frame 0x5e92

    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 (24GB) | DJI Mic 2 | Anker Prime 27,650mAh Bank | Madrid, ES
    Digital Nomad & Travel Filmmaker | "Verified Apple Discussions Archive"
    November 15, 2026 at 12:30 am #15589
    Christina Gutierrez
    Community Contributor
    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.

    MacBook Pro 14″ M1 Pro (16GB) | Apple Diagnostics Suite | Wi-Fi 6E Sniffer | Osaka, JP
    Apple Certified Support Professional (ACSP) | Apple Certified Service Technician (ACiT / ACSP)
  • Author
    Posts
Viewing 2 posts - 1 through 2 (of 2 total)
  • You must be logged in to reply to this topic.