Type: com.apple.metadata
Subtypes: _kTimeMachineOldestSnapshot
Serialisation: none
Data type: binary Property List containing binary data, a single NSDate.
Example: <62706c69 73743030 3341b8bd 2e620000 00080000 00000000 01010000 00000000 00010000 00000000 00000000 00000000 0011> «bplist003A¸½.b »
macOS: Sierra only, not encountered in High Sierra
System use: only found in /private/etc, /private/var, /System/Library/LaunchDaemons/org.postfix.master.plist, /System/Library/Speech/Recognizers, and /System/Library/Speech/Voices
App use: fairly common
Document use: fairly common
Other usage: can crop up anywhere, apparently in older files

Purpose: unknown
Information:
Appears to show the time of the oldest backup of that item, but has not been updated for a long time, and not seen at all on High Sierra systems. The date shown is likely to be around the time of upgrading to El Capitan, e.g. in September 2015. Probably obsolete.

Links:

Original page: 2017-12-28
Last modified: 2017-12-30