I'm running OS X 10.9.2 on a MacBook Pro (Mid-2012) and cannot change its region (locale) via System Preferences -> Language & Region:

Changing it ostensibly works, but revisiting the preferences pane later shows the region reverted to its previous value.

In terms of what tools and apps report, the story is inconsistent:

  • defaults read -g AppleLocale does show the NEW locale
  • locale, by contrast, shows the PREVIOUS locale
  • Similarly, Calendar.app shows holidays from the PREVIOUS locale

Thus, for the most part, the system behaves as if the region changes was ineffective - which is at least consistent with the preferences pane reverting to the previous value.

Here's what I've tried:

  • Reset the NVRAM
  • Repaired the disk with Disk Utility
  • Booted into single-user mode and ran fsck -yf
  • Cleared most caches with OnyX
  • Checked the syslog for telltale entries

All to no avail.

Any help is appreciated.

  • Can you look in the Console at the Specific time stamp and for who is changing it back.
    – Ruskes
    Mar 17, 2014 at 11:04
  • @Buscar웃: The only entries that changing the region seems to trigger are ones like 3/17/14 12:22:22.421 PM com.apple.time[181]: Interval maximum value is 946100000 seconds (specified value: 9223372036854775807). - and those also happen on machines where changing the region DOES work. Do you know what to look for specifically?
    – mklement0
    Mar 17, 2014 at 11:26

1 Answer 1


Is there maybe an AppleLocale key in ~/Library/Preferences/ByHost/.GlobalPreferences.*.plist? That would override the key in ~/Library/Preferences/.GlobalPreferences.plist.

  • That was indeed the problem - thank you. Any idea how the AppleLocale setting got in there? After deleting the /ByHost/ version I noticed that a new incarnation reappeared later, though - fortunately - without an AppleLocale entry.
    – mklement0
    Mar 21, 2014 at 2:43

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