Fix your Mac with AppleJack

runs on Mac
screenshot of AppleJack

When you're out tooling around with your favorite Mac, sometimes things go wrong. Luckily, it's easy to fix many of these potential problems with tools like Disk First Aid, that are built into OS X. That's all well and good, provided your machine will actually boot into the Aqua GUI that we've all come to love on our Macs. But when your system has gone so far south that it won't even get you that far, then it's time to bring in the heavy artillery.

AppleJack is a remedy of last resort to help you bring your Mac back to the land of the living. Instead of relying on the windows and widgets of the GUI, it runs in that mysterious "Single User Mode"—the one where you get the cryptic text-only screen to work with. Once you boot into Single User Mode (by holding down [Command] + S while booting up), you invoke the app by typing "applejack" at the prompt. You'll get back a menu of choices, allowing you to repair disks, repair permissions, and tweak various other settings to make your machine behave once again with a little dignity.

Now if you're more than a little intimidated by working through that terminal interface, you may want to go grab the nerdy neighbor kid to give you a hand. but if you take it slow and easy, you may surprise yourself and be able to tap into your inner geek.

Needless to say, you'll need to download AppleJack before you need it, and then remember to use it when you need it. But hey, it's a free download for your OS X Mac, so maybe you'll want to give it a shot.

Download AppleJack

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