AppleJack is a user friendly troubleshooting assistant for Mac OS X. With AppleJack you can troubleshoot a computer even if you can`t load the GUI, or don`t have a startup CD handy. AppleJack runs in Single User Mode and is menu-based for ease of use


  • disk repair in single user mode
  • permissions repair in single user mode
  • cache cleaning in single user mode
  • preference file check in single user mode

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User Reviews

  • Always loved Applejack BUT now it will not work with Snow Leopard that has been installed as a boot system on a SSD Expresscard on a MacBook Pro. (Holding down Command-s at the chime has no effect.)

  • Was GREAT up until 10.5 Version 1.5 Totally screwed up my 10.5 disk. Had to reinstall and lost tons of data.

  • This was once an indispensable utility for Macintosh computers followed closely by Disk Warrior. Unfortunately, the developer has opted to cease working on it. There will not be a certified version for Snow Leopard!

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Additional Project Details



Intended Audience

Customer Service, System Administrators, End Users/Desktop

Programming Language

Unix Shell