Well, you don't describe what you were doing when these crashes happen.  Is there anything reproducible?

If you've had these issues with multiple versions, I have to ask if you've ever done a completely clean install of your system?

I would suggest trying that at some point and ONLY installing MC for a short period to see if that solves the problem.

I wish it were predictable. Sometimes it crashes on startup, sometimes it crashes while I'm closing down and sometimes everything in between.  There has been no consistent pattern.  

I use the Mac Pro as an edit system only.  I do all my non-edit work on an iMac, so that every time I update Symphony/Media Composer I can do a clean install of both OSX and Avid.  Every update has been a clean install. 

I've followed all the official Avid recommendations and tried every single possible solution l've been able to find on the forums.  Nothing has worked.  I'm on a supported system confirguration and the software just crashes. It is a constant source of frustration that is causing me to start more and more new projects on Adobe.

I prefer Avid, but to stick with it I'm going to need a fix to the crashing soon.  The last truly stable build I remember was 3.5....  

Jakob, I completely agree - asking users to set their entire system hard drive to Everyone:r+w sounds like a terrible idea. (Admittedly, I don't remember if this automatically applies to subfolders or those will still be secure, but still.)

I tried creating an "Avid MediaFiles" folder with 777 permissions (r+w for owner,group,everyone), and I'm still getting this message. I even tried to create an "MXF" and "1" folders, didn't help either. Any ideas on how to get this workflow to work?

My Avid MediaComposer with Symphony option v7.0 also crashes all the time - very frustrating!

It happens almost all the time when I create a new sequence, or change sequences. I have started with fresh project, fresh install, fresh install from scratch (new hard drive) fresh bins, all the hard drives have been set to correct permissions.

Mac Pro 2008 2.8 8-Core 12Gb Memory - SSD internal drive Media on 2 x Seagate Barracuda 7500 rpm Sata 3Gb drives. Dual Monitor on ATI Radeon 5770

Did you upgrade your OS to 10.8.4 (that's the supported OS X version for MC 7.0)?

Yep, I did a complete install of OSX 10.8.4 from scratch when I updated to MC 7.0

It continues to crash and throw up the "segmentation fault" error on a daily basis.

I discovered that it happened with ANY Hard drive / mounted drive / optical drive in my system for which I did not have Read & write priviledges. So I am making sure they are all dismounted before I make a new sequence. It would happen a few times a day that I would receive media files on removable drives from clients, and that seemed to be the problem

GOOD SO FAR! I will report back. 

I am on 10.8.4 - will change my sig line

Upgraded from MC 7.0 to 7.0.2 and now I get this "segmentation fault" error everytime it launches, then it crashes. It's also telling me the Panasonic P2 AMA plugins are not compativle with this version of MC.

I've tried downloading the P2 AMA plugins from avid.com/ama and re-installing them, but it says they're not compatible with this version. 

Not sure what to do at this point... Thanks in advance.

Yo Eric

Can you check your internal drive permissions?  Bet it is set to Read Only and not read/Write which is should be...

1.    Click on the system (Macintosh HD in most cases) drive to highlight
2.    From the File menu select Get Info (cmd+I)
3.    Click the lock icon in the bottom right to make changes
4.    Click on the “Read only” text in the Privilege column next to Everyone and set the privilege to “Read & Write”

report back

Marianna 

Marianna, thanks for quick reply. Yes, I did that. Also tried uninstalling/reinstalling MC 7.0.2 and problem still persists. Where is the P2 AMA Plugin located? Can I simply delete it, reboot, and try launching program? I have a feeling that's the culprit.

Search for the Plug-In folder.  

Yu cna drag it to the desktop and launch and see if that does it - if so, create a temp folder on the desktop and move the plug-ins into it.  Put the original Plug in folder back ( empty) and add a few at a time till you fidn the culprit.

M

This problem still persists. I've searched in every plug-in folder, and even system-wide, and I can't find the P2 AMA plug-in. Here's the error that I keep getting, then MC finishes launching, and immediately crashes.

All plugins are located in /Library/Application Support/Avid/AVX2_Plug-ins/AMA.

Thank you, Kevin! Removed the plug-in, and now everything works.

I was getting this error with 7.0.0 Mac os 10.8.4 when switching Users and launching Media Composer. 

Going to the Users/Shared/AvidMediaComposer folder and setting this folder and all enclosed items to read/write permission solved the problem for me. Apparently, when you run permission repair in disk utility it is messing with some file, especially in the AMA Management folder. I assumed that because this is a shared folder that OS permission repair shouldn't be changing anything to read only, but I was wrong! Didn't take time to track downt the exact file but this is my new go to method when error messages start popping up!