MacOS – How to use tmutil to figure out what’s wrong with the Time Machine

macostime-machine

How do I use tmutil to figure out what is wrong with my Time Machine as it keeps backing up huge amounts of data each time it back-ups although nothing has changed since the last back up?
I'm backing-up to a Drobo FS

Best Answer

Use

tmutil listbackups

to get a list of existing (completed) backups.

Then run one or both of

tmutil compare # to compare current drive to latest backup
tmutil compare /one/path/from/list /other/path/from/list # compare two backups