Information Technology Reference
In-Depth Information
appeared in, or was deleted from, a certain folder; list all the files
copied during a certain backup run; compare any two snapshots (in
part or whole) to see what's different between them; and even compare
two versions of the same file to see what's changed. You can also
restore files or delete data from Time Machine—with more flexibility
than Apple's interface offers—directly in Back-In-Time.
Purge Deleted Applications
from Time Machine
When you drag an application to the Trash and then empty the Trash,
Mac OS X deletes the application—but not any backups that may be
stored on your Time Machine disk. That's as it should be, but there's
a problem. If you double-click a file created by that deleted application,
Mac OS X may in some cases launch a copy of the deleted application
on your Time Machine disk , rather than displaying a message that
the software cannot be found. This constitutes a security risk; if the
application you deleted is buggy, or contains a virus, or exhibits any
other sort of bad behavior, your problem doesn't necessarily go away
just because you've deleted the offending application!
The only solution is to delete all backups of the application from your
Time Machine disk; see Delete Files from a Time Machine Backup .
Solve Even More Time Machine Problems
James Pond runs a Web site with tons of information about every
aspect of Time Machine, and if you get stuck—or can't find the answer
to your problem in this topic—I highly recommend it as a resource.
In particular, be sure to visit the extensive troubleshooting section .
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