Hi Everyone, I was having this issue and just solved it. My iphone 4s was not showing any backups except for the most recent one. This was horrifying because the most recent backup was made as soon as I connected my phone to the computer. So I could not backup to a time that would have been useful, but instead could only update to right now--when my phone was messed up and useless!! So, to correct thisI I went to
~/Library/Application Support/MobileSync/Backup
In that folder I found two backups. One from 6 months ago that I wanted and one from today when I plugged in my phone (ps-deactivate the automatic synch option because it will automatically override your past back ups...)
Here is where it gets a little bit complicated, but still managable even for a novice:
If iTunes tells you there are no back ups but there are more desirable backups in the backup folder, then click "back up now" and a new clean functional backup will be created (of course not with the data you want, but we will get to that) . Now go to the backup folder and open the folder that was just created by Itunes. Skip next step.
If itunes is only showing the most recent back when you click "Restore Backup" but in the backup folder but there are more desirable backups, open up the folder of the most recent (non-desireable) back up folder.
Now that your folder (latest backup) is open you will see a very long list of files. At the very bottom of the file list you should find this file:
Info.plist
Open the file info.plist, that is an xml formated file. Copy all the text from the begining all the way up through
"<key>IC-Info.sidv</key>"
Now, with that info on your clipboard, close this file and go back to the backup folder. Now open the back up that you actually want (the older one that is not showing up in itunes). In that folder you will also find the Info.plist
Open that file and delete everything all the way through "<key>IC-Info.sidv</key>"and then paste what you copied from the other file.
Now save the file and close it.
Open up iTunes. You should now be able to see the older backup version that you wanted to backup to but that ****** *** itunes would not let you see before.
Sounds complicated, but is pretty easy actually.
Good luck!