To avoid this, I suggest you make this backup in a disk image (. Dmg) from our library using Disk Utility from Apple.
This method has the advantage of being both simple and quick to implement and compatible with any particular file system.
To do this:
- Launch Disk Utility, located in Applications / Utilities.
- Drag the icon of your library iPhoto (iPhoto Library) to that of 'Disk Utility' in the Dock. (At this moment, a window opens asking you where to save your disk image).
- Put you to where you want to save your library, give it a name (eg SVGiPhotoDu30052008) and choose 'read only' opposite 'Format Picture '.
- Click the 'Save' button (the backup starts and will materialize in the presence of the file SVGiPhotoDu30052008.dmg, to the location you have selected when it is completed).