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.
Fine-grained security, just like iPartition.
AppleScript support.

What's New v2.2.8

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.

Requirements
Intel
OS X 10.6 or later
10.10 is not supported

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