With the release of Mac OS 10.7 Lion and now 10.8.x Mt. Lion, the default permissions for the root level of the system drive of the Mac are now set to “Read Only” for all users.
This prevents the Editing Application (MC or Symphony) from being able to use this drive as a media drive.
You will see the drive grayed out in Media Creation settings or as an option for import, mixdown, render, and consolidate/transcode or see an error "Segmentation Fault at 0x0"
For customers that don’t intend to use the system drive for media, they can leave it as is. This is ideal in most cases. For those that need to use the system drive, they should take the following steps to change permissions:
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”
Customers should now be able to see the system drive as a valid media drive. Note: repairing permissions on the system drive will reset and they will have to repeat this procedure.