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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 in PostCheck

Version 2.5:

Note: Now requires OS X 10.9 or later running on a 64-bit Intel processor

  • New Gatekeeper-compatible installer app, rather than a simple command-line tool
  • Now distributed on a macOS 10.12 Sierra-compatible signed disk image, rather than a ZIP file; required because of Gatekeeper's new Path Randomization security feature
  • Worked around a bug in

Requirements for PostCheck

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

5 4
Current Version (2.x)
Downloads 5,245
Version Downloads 221
License Demo
Date 30 Sep 2016
Platform Intel 64 / OS X
Price $10.00
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