DiskWarrior 4 is required for Intel-based Macs. Learn about the new features of DiskWarrior 4 and how to upgrade by clicking here.
Please note that to install DiskWarrior 4 onto your hard disk, your Mac must start up in Mac OS X 10.3.9 through 10.7. This is a change from DiskWarrior 3 which supported older versions of Mac OS X. Attempting to launch DiskWarrior 4 under older versions of Mac OS X will have different results depending upon the version of Mac OS X your Mac is running. You will either see an error message or, possibly, DiskWarrior 4 will momentarily appear in the dock and then disappear with no message displayed. Please read the system requirements for DiskWarrior 4.
DiskWarrior 4 version 4.3 is now available on DiskWarrior DVD revision 1107. This DVD is a universal startup DVD that can start up both PowerPC and Intel Macs. All Mac models meeting the system requirements for DiskWarrior can be started from the DVD. 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. Click here to learn how to repair the directory of a disk in a Mac model that cannot be started from the DiskWarrior DVD.