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iDefrag and macOS 10.12.4

On macOS 10.12.4, changes made to the system mean that iDefrag 5.1.7 and earlier can no longer enter reboot-and-defragment mode. We understand the cause of this problem, and have what we think is a solution for it, which is currently being tested to make sure we ...

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Open letter to


For the second time now, you’ve started throwing our license e-mails on the floor, in spite of them being accepted by your mail servers:

Mar 28 09:21:37 xxxxx postfix/smtp[13068]: 10C9320070: to=,[]:25, delay=1.5 ...

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iPartition 3.6.0

Users running macOS Sierra (10.12) may be interested in the iPartition 3.6.0 update. This is only for users running 10.12 and above; those running 10.10 or 10.11 should stick with version 3.5.1 instead.

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iDefrag 5.1.7

We’re pleased to announce the release of iDefrag 5.1.7 (release notes).

This version resolves a problem with the code signature on the CoriolisSnapshot.kext kernel extension that was affecting customers with macOS Sierra.

There are no other changes in this release.

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iDefrag 5.1.6 Released

We’re pleased to announce the release of iDefrag 5.1.6 (release notes).

This version is intended to resolve a problem whereby machines that updated from an earlier version to 5.1.5 may not have updated the CoriolisSnapshot.kext kernel extension, which may result in macOS Sierra objecting to ...

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iDefrag 5.1.5

We’re pleased to announce the release of iDefrag 5.1.5 (release notes).

Note that this version removes the “Create Boot Disk” feature, as it will not work on machines on which macOS Sierra has been installed (regardless of whether the machine is running Sierra at the time or not ...

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iDefrag 5.1.3 and macOS Sierra

As some customers have pointed out, iDefrag 5.1.3 does not work properly with macOS Sierra; in particular, the reboot-and-defragment and “Create Boot Disk” functions do not work.

You can read more about this in our support article, but if all you want is to get going again, the ...

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iDefrag 5.1.3

We’re pleased to announce the release of iDefrag 5.1.3 (release notes).

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iDefrag 5.1.2

We’re pleased to announce the release of iDefrag 5.1.2 (release notes).

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iPartition 3.5.1

We’re pleased to announce the release of iPartition 3.5.1. Changes in this release:

  • Fixed a problem that prevented progress bars from updating.
  • Fixed a handful of crasher bugs.

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