Shirt Pocket has released version 2.7 of its SuperDuper drive-cloning and backup software with support for the OS X 10.8 Mountain Lion’s Gatekeeper security feature. Additionally, the new release should start more quickly (even with unresponsive network volumes) and copy files faster, and it improves the copying of active files from apps that rapidly create and delete files during a backup (which could cause some files to vanish from a backup). The status window has been updated to show what’s going on while larger files are being copied, diagnostics have been improved to more accurately return errors when drives can’t be read or written to, and local Time Machine snapshots (.MobileBackups) are no longer copied to reduce backup failures. SuperDuper has also been updated to support the latest version of Growl (which also provides support for Mountain Lion’s Notification Center). However, SuperDuper isn’t “fully compatible” with Mountain Lion, as Shirt Pocket notes in its announcement blog post that it couldn’t complete work for supporting the automatic mounting of local volumes in time for this release. SuperDuper 2.7 requires Mac OS X 10.4.11 or later (which means it still supports both Intel- and Power PC-based Macs). (Free for basic functionality, $27.95 for additional features, free update, 3.2 MB)
Extract Directly from Time Machine
Normally you use Time Machine to restore lost data in a file like this: within the Time Machine interface, you go back to the time the file was not yet messed up, and you restore it to replace the file you have now.
You can also elect to keep both, but the restored file takes the name and place of the current one. So, if you have made changes since the backup took place that you would like to keep, they are lost, or you have to mess around a bit to merge changes, rename files, and trash the unwanted one.
As an alternative, you can browse the Time Machine backup volume directly in the Finder like any normal disk, navigate through the chronological backup hierarchy, and find the file which contains the lost content.
Once you've found it, you can open it and the current version of the file side-by-side, and copy information from Time Machine's version of the file into the current one, without losing any content you put in it since the backup was made.