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Navigation Community & Tools L'actu des autres... Avid Actu' Media Composer Mac Community

Feed Avid Media Composer Mac

Avid Media Composer - Mac
Forum for advanced Media Composer Mac users.
  • ETA on MacOS Sonoma Compatibility?

    Anyone "in the know" care to weigh in?

    I mean, someone had to ask.


  • MC 23.8.0 update - now crashes on extract edit

    I upgraded to MC 23.8.0 and instantly discovered I cant do a simple extract edit on an audio track without a segmentation fault. Useless! There may be other issues but I don't have time to explore the vast possibilities. I went back to 23.3.1 and all is well again.

    I use an M1 MacBook Pro running on OS Monterey 12.6.8.

  • Titler+ Media Composer 2023.8 Text Entry issue

    Hi when I create projects that are non standard frame sizes, like 1080x1800 or 1080x1920 in many of the latest MC versions but also 2023.8 entering text into the Titler+ in the record monitor is really tough because the cursor doesn't line up to where the exact text is being entered so I have to estimate where the character is or where the cursor is. Whereas in a 1080x1920 or 720p project (like classic) Titler+ works fine and the cursor and characters are exact.

  • Importing Pro Res 4444 Alpha QTs to AVID Issue


    I am on AVID Media Composer 2023.8 but ever since the 2021 version or so when I try to import a Pro Res 4444 Quicktime with Alpha no matter if I choose Do not Invert Alpha or Invert Alpha I always have to invert the alpha in the clip after importing it and cutting it into the timeline. That makes it tough cause I can't just import 100 clips with Alpha, and cut them into my timeline, I always have to cut them in then invert to see the contents.

    These Pro Res 4444 Quicktimes are coming from Adobe After Effects, since 2021 but now we're on 2023 and we've always rendered the same way for 5-10 years with a straight non premultiplied alpha and a standard Pro Res 4444 Quicktime with alpha.

    How can I fix this or should I be rendering to another Codec? Pro Res 4444 is so great though. Also if I render to the AVID DNX codec the same thing happens.


  • Back with More Stability Issues - MC 2023.8 and Mac Studio M2 Max

    Hi, starting a new thread for transparency and clarity. I've been dutifly and systematically troubleshooting Media Composer releases in conjuction with Mac silicon and it continues to baffle me with its instabliity. The software is borderline useless.

    I currently have Ventura 13.5 running on a M2 Max Mac Studio with 96 GB of RAM. I did a complete uninstall of Blackmagic drivers and Media Composer. Like, COMPLETE. All the way down to site settings and leftover library files.

    I did a clean install of Media Composer 2023.8. I launched a project. No user settings, just defaults. No Black Magic drivers installed. I looked at a timeline. Everything seemed normal. And I closed the software.

    It crashed.

    Any insights to be had here? I've got crashes saved, system reports and System IDs ready and waiting to share. And I've filed a new support case.


  • Paint Effect - Modes - SOLVED!

    MC 2023.3.1  Mac Big Sur

    I cannot find the Modes button in the Paint Effect.  The doc mentions it.

    Have Modes been removed and the doc is not correct or am I blind?


  • Relink - linked media fail?


    Trying to relink Linked media that is on an external drive.  When I choose the offline clip and attempt to relink, I can not find a way to choose the external drive.  I only see the system drive.


  • Configuring Waveform Cache

    Editors on new Mac Studio M2s / macOS Ventura / Avid 2023.3.1 and 2023.8

    Shared storage (Osiris)


    Editors report "configuring waveform cache" when opening the project *sometimes* -- not always the first time, but sometimes.  And when it does it, it takes for.ever.  Hours in some cases.  Happening with multiple long-form documentary-style projects so many bins, much media.


    I see an old thread about this:



    Doesn't appear to have surfaced any solutions.  I need heeeeelpp.

  • Moving into Source/Record mode won't close Effect Editor

     it used to be in the days of earlier versions of MC that when you would toggle into source/record mode, Avid would close the effect editor window. However, now it seems in 2023.3.1 that the effect editor remains open, which seems against the point of switching out of effect mode. Am I doing something wrong or does anyone know how to fix this? I've mapped these modes to my keyboard, if that's helpful.

  • Exception: AMPI subsystem Error Identified

    Exception: AMPI subsystem error, ErrorMessage:Permission denied (13) when launching Media Composer 

    We are continuing to receive reports from users receiving an error message: “Exception: AMPI subsystem error, ErrorMessage:Permission denied(13)" mostly on Macintosh systems. 

    As reported last week, this is most likely related to a permission error in a "Pro Tools" Presets folder.  Since Pro Tools and Media Composer share this folder, and plugin architecture there might be some more clues in this Knowledge Base Article that can help with the AMPI Permission Denied error.

    Steps to correct:   For now, we have listed the steps to take in order to resolve the issue listed in the Knowledge base article below:


    Questions, let me know and if you do the steps outlined and still have issues, please create a case on the Avid Support Portal at Avid Support Portal


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