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iDefrag helps defragment and optimize your disk for improved performance. Features include:

  • Supports HFS and HFS+ (Mac OS Extended).
  • Supports case sensitive and journaled filesystems.
  • Supports adaptive hot file clustering ("Hot Zone").
  • Four powerful defragmentation algorithms:
    • Compact data, moving all free space to one place.
    • Optimize filesystem metadata.
    • On-line defragmentation.
    • Defragment whilst your disk is mounted.
    • Advanced programmable optimization.
    • Rearrange your disk the way you want.
  • B-Tree metadata file compaction/optimization support.
  • High more...

What's New

Version 2.2.8:

Note: This version is not compatible with OS X 10.10 Yosemite. This is an update for existing users so that iDefrag will run on OS X 10.9.5 when it’s released.
  • Minor change to the behaviour of the "Check for Errors" option.
  • Compatible with upcoming Gatekeeper changes in 10.9.5 update.
  • Fixed a hard-to-trigger bug in our HFS code that might have caused a crash.


  • OS X 10.6 or later

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Current Version (2.x)


Downloads 271,678
Version Downloads 9,185
License Demo
Date 13 Sep 2014
Platform Intel 64 / OS X / Intel 32
Price $39.95
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