I have a new iMac running OSX 10.12.4. It has an internal Apple-Supplied 512Gb SSD, of which about 140 Gb is used. As with my previous machine, I use Time Machine to backup on to an external 2Tb hard disk.
However, I find that every TM backup appears to be a full backup, not an incremental backup.
How can I get Time Machine to make proper incremental backups, as it’s supposed to?
By way of background,
- Each backup takes a very long time; so long that it cannot backup hourly because it’s still completing the last backup.
- On the Preferences panel it tells me that it is backing up … GB of 131 GB.
- The space left on the drive corresponds to multiplying the number of backups by the full amount of data.
- After about 18 backups, it starts deleting old backups
- I get the disk full message too soon
So I am convinced that they’re all full backups.
I have tried everything I can think of, including:
- turning it off and on again
- re-formatting the drive
- replacing the drive
- reinstalling the OS
- deleting the plist, as per Pondini’s web site
- removing some software suspected of interfering with TM
- excluding additional folders
- putting chicken feathers in a paper bag and waving it around my head
I have spent countless hour with Apple support. As a desperation move, they now want me to do a clean install, which, in my opinion is going too far, and certainly not something I am enthusiastic.
I am aware of this question: Time Machine keeps doing full backups
- it’s 5 years old
- the asker says that TM also does incremental backups
- despite the accepted answer, the question is not really answered