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Year released:
[www].se [ftp].se [mirror].us
iDefrag_1.7.3_OS_X_10.3.sit (4.88 MB)
MD5: 143958f7ac275b0993d3f5e8595f8be1
For Mac OS X
[www].se [ftp].se [mirror].us
iDefrag_2.0.5_OS_X_10.4-10.5.sit (14.87 MB)
MD5: 7cb9364f6e4bab666280834d520c68d2
For Mac OS X
[www].se [ftp].se [mirror].us
iDefrag_2.2.8_OS_X_10.6-10.9.sit (18.64 MB)
MD5: 68ea2201e90a723649a1beae3cde066f
For Mac OS X
[www].se [ftp].se [mirror].us
iDefrag_5.1.3_OS_X_10.10-10.11.sit (14.19 MB)
MD5: 81bfabd600aa9f3b5a2a0e7824b654de
For Mac OS X
[www].se [ftp].se [mirror].us
iDefrag_5.3.1_OS_X_10.12-10.13.sit (13.79 MB)
MD5: 199301794a227b51d6643f28e862bf47
For Mac OS X
Guides on emulating older applications

Defragment and optimize your disk for improved performance.

This software and its licenses have been made available for free by its developer, Alastair Houghton.

Features from iDefrag in 2006:
-Send email notifications or make noises when done.
-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 performance user-defined file classification engine
-Per-block and accurate whole disk display.
- Detailed statistics so you know whether you need to optimize.
- Inspector allows you to view details of individual extents/files.
- Quickly jump to specific files to examine them in more detail.
- Altivec accelerated display for improved performance.
- Auto-update feature ensures you always have the latest version.
- AppleScript support.

NOTE: Do NOT use iDefrag on an APFS volume and/or an SSD.


iDefrag_1.7.3_OS_X_10.3.sit contains the application (.dmg) and license file.
iDefrag_2.0.5_OS_X_10.4-10.5.sit contains the application (.dmg) and license file.
iDefrag_2.2.8_OS_X_10.6-10.9.sit contains the application (.zip) and license file.
iDefrag_5.1.3_OS_X_10.10-10.11.sit contains the application (.dmg) and license file.
iDefrag_5.3.1_OS_X_10.12-10.13.sit contains the application (.dmg) and license file.

iDefrag and other useful tools created by Alastair Houghton are also available from the Coriolis website.
If you find this software useful, Alastair would be grateful for any donation made towards it (via PayPal link on Coriolis web page).
Architecture: PPC x86 (Intel:Mac)


OpenSourceMac's picture
by OpenSourceMac - 2020, January 15 - 9:34pm

***Update to This***
I used CCC to copy the data from the corrupted drives and it was only two files that were damaged (maybe were already) and the system did run faster - so as is the never-ending truth, have backups before using this.


Just a warning to everyone on this app. I've had considerable data-corruption on two different drives I've used it on. Ironically, the drives/systems don't seem to know it and seem to work fine, but neither one can be back-up now.