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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 more...

What's New

Version 5.1.1:

Note: OS X 10.10 Yosemite users will need to use version 5.0.1, rather than the latest release for now, because of a compatibility issue involving kernel extensions. This will be fixed in 5.1.2. You can download 5.0.1 from Related Links.

  • Fixed a minor bug in the software update UI
  • Fixed a problem with the distribution image that meant that updating didn’t work


  • OS X 10.10 or later

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4 136


Current Version (5.x)


Downloads 282,616
Version Downloads 1,236
License Shareware
Date 13 Mar 2016
Platform Intel 64 / OS X
Price $39.95
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