Hi,

firstly i have to say that I'm a newbie and that I'm using Mac OSX just 3 days.
I'd like to understand how Mac OSX Leopard works with the "mach_kernel" and these files and directories:

/mach_kernel
/System/Library/Extensions/
/System/Library/Extensions/System.kext
/System/Library/Extensions.mkext

What I know is, that I can load and unload with "kextload" and "kextunload" these kexts files which are stored in "/System/Library/Extensions/", so these kexts must be some kind of modules, that could have access to the respective hardware.
But I don't have an idea about the files "System.kext" and "Extensions.mkext".

I'd like to know it, because I have some problems with my USB-Ports.
The USB-Ports just works only, if the USB devices are plugged in before I start my PC.
But when I plug in a new USB device, the divice won't be recognize from Leopard.

And I encountered something which could be the problem.
The version of the kernel and the version of the "Info.plist" which are stored in the "System.kext" doesn't match.

The kernel-version:

Code:

clausismus-lin:~ clausismus$ uname -a
Darwin clausismus-lin 9.2.0 Darwin Kernel Version 9.2.0: Sun Mar  2 00:35:29 SCT 2008; made by ToH:xnu-1228/BUILD/obj/RELEASE_I386 i386

The "Info.plist" in "/System/Library/Extensions/System.kext":

Code:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>English</string>
	<key>CFBundleGetInfoString</key>
	<string>System Resource Pseudoextension, Apple Computer Inc, 9.4.0</string>
	<key>CFBundleIdentifier</key>
	<string>com.apple.kernel</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>System Resource Pseudoextension</string>
	<key>CFBundlePackageType</key>
	<string>KEXT</string>
	<key>CFBundleShortVersionString</key>
	<string>9.4.0</string>
	<key>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleVersion</key>
	<string>9.4.0</string>
	<key>OSBundleCompatibleVersion</key>
	<string>9.4.0</string>
	<key>OSBundleRequired</key>
	<string>Root</string>
	<key>OSKernelResource</key>
	<true/>
</dict>
</plist>

I hope you can help.

Oh, I forgot the specification of my PC.

Mainboard: ASUS M2N-MX (NForce 430)
CPU: Athlon X2 5000+
RAM: 2x 1GB
GRAPHIC: NVidia Geforce 8600 GT 256MB
SOUND: Audigy 1
HDD: 700GB SATA
CDROM: DVD IDE