Startup Syringe

1.1 27 Oct 2003

Modify or create a system BootX file.


Developer website: Ryan Schmidt

Startup Syringe is for those interested in installing existing boot images. I have written a patcher program that will allow you to install any color table and boot image into your BootX file. For those interested in creating new boot images, the program will also extract the existing color table and boot image from your current BootX file. You'll need to read the instructions that explain how to assemble the raw image data and color data together and such, but the manual extraction from and insertion into the BootX file is no longer necessary.

You really should read the Read Me included in the download, or better yet, see the Related Link near the bottom of this page. These instructions involve modifying your system's BootX file. This file is essential to Mac OS X's startup process, and if the file is absent or damaged your computer will not start up to Mac OS X. Please have your computer's Mac OS 9 CD available in the event that your modifications to this file result in an unbootable system.

You can boot to Mac OS 9 and replace the damaged BootX file with a working backup. The instructions are based on my own personal observations of how Mac OS X 10.2 works on my PowerBook, and could differ from the way it works on your system, or with later versions of Mac OS X. These instructions are provided as-is and any modifications you make to your system are done at your own risk. I assume no responsibility for problems that may arise as a result of following these directions, or an inability to follow them. There is no warranty.

What's New

Version 1.1:
  • Compatible with all Macs manufactured after August 1998 running Mac OS X 10.3 or any version of 10.2.
  • Compatibility with Mac OS X 10.2.7, 10.2.8, 10.3, and the Power Macs G5.


Mac OS X 10.2 or later


Current Version (1.x)


Version Downloads
Utilities / System
27 Oct 2003
OS X / PPC 32