Mac crash after installing XCode I tried installing XCode on my MacBook Pro, but for some reason, it suddenly crashed. After a reboot, I saw a message my computer had to restart because of some system failure. After this message, I get the following text on my screen...



Does anyone have any idea what this text means and what to do about it?
From the loaded kernel extensions in the backtrace, we can see that com.apple.iokit.CHUDKernLib is the bundle identifier of the kernel extension that is causing the kernel panic.

That makes sense, as the CHUD tools are part of the older Xcode installs.

If you're comfortable with the command line, what I would do is start up in single-user mode by holding down Commmand-S right after you start up your machine.

At the prompt, type the following and press return:

mount -uw /


This will mount the filesystem in read-write mode so you can make changes.

Then type the following 4 commands, pressing return after each line.

Make an "ExtensionsDisabled" folder to move the CHUD-related kernel extensions to:

mkdir /System/Library/ExtensionsDisabled


Change the current directory to the kernel extensions folder:

cd /System/Library/Extensions


Move the 3 CHUD*.kext kernel extensions to the disabled folder:

mv CHUDKernLib.kext CHUDProf.kext CHUDUtils.kext /System/Library/ExtensionsDisabled


Reboot:

reboot


If you're not comfortable with the command line, you could start up in safe mode and delete (or disable by moving elsewhere) the following 3 files: 

/System/Library/Extensions/CHUDKernLib.kext
/System/Library/Extensions/CHUDProf.kext
/System/Library/Extensions/CHUDUtils.kext