I have Time Machine set the do one backup overnight on a late 2013 rMBP running Mavericks. It is taking about 2 hours to do an incremental backup. On my previous machine (early 2009 17" MBP), this would typically take 3-4 minutes. And incremental SuperDuper clones are taking 1-1/2 hour to complete when on my previous mac it would only take 6-10 minutes. It appears that all or most of my data is are constantly changing on my new Macbook, in a way not seen on my previous unit, causing incremental backups of Time Machine and SuperDuper! to take an excessive amount of time. Can anyone shed any light on this? What is going on? Thanks in advance!