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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 5.1.0:
  • OS X 10.11 El Capitan compatibility fixes
  • Some (very subtle) UI changes to make iDefrag match the OS X 10.11 El Capitan look-and-feel
  • Now translated into French, German, and Japanese


  • OS X 10.10 or later

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4 135


Current Version (5.x)


Downloads 280,124
Version Downloads 943
License Shareware
Date 13 Nov 2015
Platform Intel 64 / OS X
Price $39.95
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