to commonly asked questions.

Time Capsule doesn't have enough room to backup

My time capsule says that the backup is too big. I think that I need to delete the content and start fresh or somehow get it to delete old backups. What do I do?

Several ways to go about this. You could erase the time capsule drive and start the backup over again by going into Airport Utility, selecting disks, then erase from there. You’ll then need to re add the time capsule drive as a time machine drive via system preferences.
Another way would be to mount the time capsule drive from the finder window then select the sparse image bundle (my arch nemesis) then delete it, followed by emptying the trash. That would also free up space. It’s possible that deleting one sparse image bundle made from another computer backup may from up enough space to allow your own computer to back up as well.
Another solution (although short term) would be to exclude many items from backing up (system preferences/time machine/options). This would allow for only the most important items to be backed up. i.e.: iPhoto library or documents folder. Not the best choice here either.
The thing not to do, is mount the sparse image bundle, therefore revealing your backups.backupdb folder then selecting a range of backup folders and deleting them. I do not recommend that method.
This image is a theme.plist hack