How to Delete Old Backups from Time Machine on Mac
If you use Time Machine to backup a Mac to an external drive, you may decide to manually delete old backups that are no longer needed. Yes, Time Machine does it’s own housekeeping, but sometimes users need to manually intervene. This can be for a variety of reasons, whether for simple removal of old backups, or if you eventually run into space limitations on a backup drive where Time Machine triggers an error saying “Time Machine could not complete the backup. This backup is too large for the backup disk. The backup requires XX GB but only YY GB are available.”
Whatever the reason, you can easily delete old backups from a Time Machine drive to either free up space on that drive for a new backup, or just to perform some manual house keeping of a Time Machine drive.