What is DiskWarrior?
DiskWarrior is the safest, most technologically advanced, most powerful utility to eliminate directory damage available for any computer.

DiskWarrior uses a different approach to disk directory repair than other programs.
DiskWarrior is not a disk repair program in the conventional sense. Instead of patching the original directory, it uses a patent-pending technology to quickly build a new replacement directory using data recovered from the original directory, thereby recovering files, folders and documents that you thought were lost and that no other program could recover.

How does DiskWarrior recover data no one else can?
At Alsoft, we know that the most important thing when you are attempting to repair your disks is getting your data back. That's why the first thing DiskWarrior does is scavenge your original directory to find all the file data it can. It then uses this data to build an entirely new replacement directory.

DiskWarrior is the only product that finds all of your data.
Its patent-pending method always results in a perfectly rebuilt directory without any errors and that contains all of your file and folder data.

System Requirements

DiskWarrior 4 supports any locally connected Mac OS Standard (HFS) or Mac OS Extended (HFS Plus) disk including RAID volumes, journaled disks, case-sensitive disks, FileVaults, Time Machine backups and iPods.

Startup Requirements
DiskWarrior now ships on DVD instead of CD. Starting up from the DiskWarrior DVD requires a G4 867 MHz Mac or better (such as a G5 or Intel Mac) with DVD drive and a minimum 512 MB RAM. The computer must also have the latest firmware updates installed. Click here to learn how to repair the directory of a disk in a Mac model that cannot be started from the DiskWarrior DVD..

Installation Requirements
To install, you must be started from Mac OS X 10.3.9 through 10.6 with at least 512 MB RAM. DiskWarrior 4 version 4.1 is completely compatible with Mac OS X 10.5 Leopard. The older DiskWarrior 4 version 4.0 has some compatibility issues when running an installed copy of DiskWarrior under Mac OS X 10.5 Leopard (see this support database entry). Alsoft recommends that you don't run DiskWarrior 4 version 4.0 while started from Mac OS X 10.5/10.6. Instead, you should download the free DiskWarrior 4 version 4.1 CD Update. This free updater allows you to create a new startup CD containing DiskWarrior 4 version 4.1.

Additional Requirements
If you plan to rebuild the directory on your startup disk, you need to start up from another disk capable of starting up in Mac OS X 10.3.9 through 10.6, such as the DiskWarrior DVD. DiskWarrior cannot be run while started up from the Apple Mac OS X install DVD.

If you want or need to run DiskWarrior 4 version 4.1 from Mac OS X 10.4 or earlier, there are two features of DiskWarrior that are not available for a Mac OS X 10.5 startup disk. First, you cannot repair the permissions of a Mac OS X 10.5/10.6 startup disk. Second, you cannot rebuild a FileVault that was created under Mac OS X 10.5/10.6. You will be able to rebuild a FileVault that was created on a startup disk that was later upgraded to Mac OS X 10.5/10.6. Your DiskWarrior DVD may start up in Mac OS X 10.4 and would therefore have these features disabled for a Mac OS X 10.5/10.6 startup disk. See the DiskWarrior manual for additional procedures to rebuild the startup disk.

While started from the DiskWarrior DVD, you cannot repair the permissions of a Mac OS X 10.5/10.6 startup disk.

If you wish to enable DiskWarrior's automatic hardware monitoring, you will need to install the DiskWarrior application on your Mac OS computer. To install the DiskWarrior application see the install requirements above. Installing DiskWarrior is not required to run the application from the DiskWarrior DVD to rebuild a disk directory.

Requirements for Older Macs
If you have older PowerPC-based Macs that are not capable of running Mac OS X, DiskWarrior 2.1 is still available for purchase directly from Alsoft. Please contact our Technical Support Department to order.

DiskWarrior 4 version 4.1 is available, by request, on CD for old Macs that do not have DVD drives. However, these CDs cannot start up any currently shipping Macs models and can only be obtained by first contacting our Technical Support Department.

Everything just disappeared after your Mac went haywire. All your work documents. The music you most enjoy. The movie of your kid's first steps. It's your life and it's gone. Don't panic! DiskWarrior will find your documents, photos, music and any other files when disaster strikes and things go missing.

• 4 application (for Mac OS X)
• DiskWarrior Manual in PDF format
• Sample DiskWarrior AppleScripts
• DiskWarrior Read Me
• Quick Start Manual

**Recent Lion Updates:

07/20/2011 - DiskWarrior 4 version 4.3 Compatible with Mac OS X 10.7 Lion
DiskWarrior 4 version 4.3 was released in March and is required to run an installed copy of DiskWarrior while started from 10.7 Lion. If you haven't already done so, you can use thefree updater for existing owners of DiskWarrior 4 versions 4.0-4.2.

07/20/2011 - DiskWarrior DVD Revision 1107 Released
DiskWarrior DVD revision 1107 was released to start up the new MacBook Pros (introduced February 24, 2011) and the new iMacs (introduced May 3, 2011). Some newer iMacs with wireless keyboards have timing issues when starting up from any DVD. Instead of pressing the "C" key immediately upon start up, wait for the startup chime and then press the "Option" key. This will bring up the Startup Manager which will allow you to choose the DVD as a startup disk. If your wireless mouse is not working in the Startup Manager, use the arrow keys to choose the DVD, then press the "Return" key to continue starting up.