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PostCheck is a plugin for Apple's Address Book that provides an efficient, one-click way to lookup missing ZIP+4 Codes, Cities and States and will format addresses to meet USPS standards. Also provides Group Lookups.

What's New

Version 2.3.3:
  • Fixed "US" capitalization in street names.
  • Installer is now OS X 10.9 compatible.


  • OS X 10.5 or later
  • Apple's Address Book
  • Works with US addresses only

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5 4


Current Version (2.x)


Downloads 4,930
Version Downloads 206
License Demo
Date 14 Jul 2013
Platform Intel 64 / OS X / PPC 32 / Intel 32
Price $10.00
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