Modify com.apple.boot.plist
You can edit com.apple.boot.plist via Terminal. Open Terminal and type the following:
Code:
sudo nano /Library/Preferences/SystemConfiguration/com.apple.Boot.plist
Press
Control+X to exit then press
Y to save.
You can alternately make a copy of this file on your desktop, edit it and then drag it back into the folder. You will have to enter your password to authorize this. Make sure the application you edit in is set up as plain text or you will have problems.
com.apple.boot.plist Syntax
The file looks something like the following:
<dict>
<key>Kernel</key>
<string>mach_kernel</string>
<key>Kernel Flags</key>
<string>-v</string>
<key>Timeout</key>
<string>5</string>
</dict>
The
Kernel key sets the name of the kernel you want OSX to load at startup.
The
Kernel Flags key sets boot-flags to be automatically entered at startup.
The
Timeout key sets the amount of time given for your to press F8 and enter options.
If you want to add more than one item to
Kernel Flags you will want to leave a single space between.
<key>Kernel Flags</key>
<string>
-v boot-uuid=CC3DCCBD-1CF3-3FEE-8D50-625375FEBF3D</string>
If you want to remove all boot-flags then it should look like this.
<key>Kernel Flags</key>
<string></string>