FCPX 10.5.2 crashes while importing XMF files from Sony FX6

Whenever there is a crash, don't forget to delete preferences - they tend to become corrupted, and that may cause further crashes.

To delete preferences, hold down command and option while starting FCP X and click Delete Preferences. The application will start in a default state, and open an "Untitled" library. Reopen the library you were working on, set the preferences the way you like them, and try again.

Are you copying to the library or leaving in place? Where is the library stored?

Does FCP have Full Disk Access in System Preferences->Security & Privacy->Privacy?

There could be something in these files, or there could be a software issue.

To test the first hypothesis you could use HandBrake or Compressor and convert the file to H264 or HEVC and see how that goes.

To look for possible software conflicts Please run Etrecheck and post its full report here.

Use the “additional text” button and paste the report into the text box.

There is likely to be some subtle issue with the file that is not noticeable in other applications but that FCP stumbles on.

But there also some serious issues that the Etrecheck report brings to light and that could cause you other problems down the road. I think you should address them sooner rather than later.

1) Your drive is essentially FULL. 50GB out of 2TB. This causes performance issues and as available space fluctuates a lot there is a chance that at some point you run out of space altogether, crashing your mac. Always leave some 10-15% or more free.

2) System security updates are disabled, and Gatekeeper is set to "everywhere".

2a)You do NOT need to set Gatekeeper this way, even if you want to run some unsigned applications.

All you need is to control-click and choose "Open" the very first time you launch an application.

2b) Go to System Preferences->Software Update, click Advanced and CHECK "install system data files and security updates"

You obviously have migrated from a previous mac, as your system has lots of old stuff, many of those very old and deprecated years ago. This can cause many issues, especially since some of these things modify the system at a rather low level.

3)   Launchd: ~/Library/LaunchAgents/com.bittorrent.uTorrent.plist
    Executable: /Applications/uTorrent.app

Why do you have this running all the time?

4) Many of these plugins and preference panes are OLD. Flip4mac, Silverlight....

and PERIAN - this has been obsoleted more than 5 years ago.

  Plugin: /Library/Internet Plug-Ins/PMCADownloader.plugin
  Plugin: /Library/Internet Plug-Ins/ContentUploaderPlugin.plugin
  Plugin: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin
  Plugin: /Library/Internet Plug-Ins/NPVirtools.plugin
  Plugin: /Library/Internet Plug-Ins/Flip4Mac WMV Plugin.plugin
  Plugin: /Library/Internet Plug-Ins/RealPlayer Plugin.plugin
  Plugin: /Library/Internet Plug-Ins/AdobePDFViewerNPAPI.plugin
  Plugin: /Library/Internet Plug-Ins/DivXBrowserPlugin.plugin
  Plugin: /Library/Internet Plug-Ins/Silverlight.plugin
  Plugin: /Library/Internet Plug-Ins/SharePointBrowserPlugin.plugin
  Plugin: /Library/Internet Plug-Ins/AdobePDFViewer.plugin
  Plugin: /Library/Internet Plug-Ins/EPPEX Plugin.plugin
  Plugin: /Library/Internet Plug-Ins/eMusic.plugin
  Plugin: /Library/Internet Plug-Ins/JoostPlugin.plugin

  Preference Pane: /Library/PreferencePanes/Flip4Mac WMV.prefPane
  Preference Pane: /Library/PreferencePanes/Perian.prefPane

Did you resolve this issue? I just updated to the laest version of FCPX and now i'm having the same issue. MXF files have been working flawlessly for me for the last month until I updated from 10.4.6 last night. Had to update to Big Sur to do it.

For anyone else that stumbles upon this issue, deleting chrome and all it's keystroke daemons and preferences etc, deleting FCP and preferences, then re-installing, worked for me. It has still crashed a few times, but that could be some other factors in play. I edited most of the day today with no problems.

the problem is not with editing, I can edit all projects I have but since it start to export "share" it shut down .. I have the 11.5.3 version two days ago and since that I cant done any projects. even the latest projects I already done I cant export them again . I people in Apple read this and try to solve our problem before they lost more people swich to other application .

Your issue is a different one from what is discussed in this thread.

There are several threads about the issue of a crash on export in 10.5.3.

And there are several proposed solutions, too. I suggest you peruse these other threads and try them out.

I will try , thanks