If you occasionally see a message saying that Time Machine has needed to delete old backups to make room, don’t worry, that’s normal. Time Machine will keep backing up versions of your files and keep around files you have deleted until it fills up its hard drive. Then it gets rid of the oldest stuff first, always keeping a complete backup of your current files. But it can be annoying to get notifications. You can switch that off in System Preferences, Time Machine. Click the Options button and turn off the “Notify after old backups are deleted” option.
Mac Video Tutorials and Tips for Apple Users
