Q: Apple USB Ethernet Host unusable

Don't know, but I saw the exact same error on my Lion 10.7.5 system.

Just now got the same on my Mavericks 10.9.4 system after installing the new iTunes

This just happened to me. The kext seems to contain a bunch of shortcuts that point to non existent files! Deleting the kext and reinstalling iTunes seems to fix it.

i.e. download the iTunes installer for osx.

at a command prompt type:

sudo rm -Rf /System/Library/Extensions/AppleUSBEthernetHost.kext

yeah scary deleting a kext but I figured as it's broken and not loading anyway how much worse can it get Reinstalling without deleting the kext doesn't work - I tried that first.

Then reinstall via the iTunes .dmg file you downloaded. Bingo no more errors and loading the kext file manually shows no errors.

sudo kextload /System/Library/Extensions/AppleUSBEthernetHost.kext

So .. now your USB devices are working again??

Is it Ok to shut my system down at this point?? Will it be able to restart Ok until Apple fixes this?

benc1 wrote:

 

This just happened to me. The kext seems to contain a bunch of shortcuts that point to non existent files! Deleting the kext and reinstalling iTunes seems to fix it.

 

i.e. download the iTunes installer for osx.

at a command prompt type:

sudo rm -Rf /System/Library/Extensions/AppleUSBEthernetHost.kext

yeah scary deleting a kext but I figured as it's broken and not loading anyway how much worse can it get Reinstalling without deleting the kext doesn't work - I tried that first.

 

Then reinstall via the iTunes .dmg file you downloaded. Bingo no more errors and loading the kext file manually shows no errors.

sudo kextload /System/Library/Extensions/AppleUSBEthernetHost.kext

Deleting the kernel extension and reinstalling iTunes appears to work at first blush, but subsequently trying to load the extension throws an error:

Gaia:~ trane$ sudo kextload /System/Library/Extensions/AppleUSBEthernetHost.kextPassword:

/System/Library/Extensions/AppleUSBEthernetHost.kext failed to load - (libkern/kext) requested architecture/executable not found; check the system/kernel logs for errors or try kextutil(8).

I'm running OS X 10.7.5.

Just do a restart after you reinstall iTunes.

Lanny wrote:

 

Just do a restart after you reinstall iTunes.

Doesn't solve the problem here.

Edited to add: Since I don't use USB-based tethering with my iPhone, I'm not overly concerned about these errors while trying to load the extension. The iPhone syncs fine and the system otherwise works, so I'll simply wait for an update to come downstream from Apple.

Can't verify your situation, the issue didn't occur with my Lion 10.7.5 partition, just my Snow Leopard 10.6.8 partitions.

Same error and unable to find a solution!

What have you tried to do?

Summary:

Launch iTunes 11.4 and have messages "Error Failed to create replacement string"

(many many messages)

Steps to Reproduce:

1) Launch iTunes 11.4 ( I have 10.6.8)

2) See Logs in Console

Expected Results:

No error messages

Actual Results:

10/09/14 21:12:18 imac-de-xxx/Applications/iTunes.app/Contents/MacOS/iTunes[2202] user Error Failed to create replacement string

10/09/14 21:12:18 imac-de-xxx/Applications/iTunes.app/Contents/MacOS/iTunes[2202] user Error *** process 2202 exceeded 500 log message per second limit - remaining messages this second discarded ***

I am under 10.6.8 and I have deleted the extension "AppleUSBEthernetHost.kext" in "/System/Library/Extensions" then download and reinstall iTunes 11.4 : same problem.

Messages during installation :

11/09/14 21:12:07    imac-de-xxx    com.apple.kextd[15]    com.apple.kextd    Error    Can't load //System/Library/Extensions/AppleUSBEthernetHost.kext - no code for running kernel's architecture.

11/09/14 21:12:07    imac-de-xxx    com.apple.kextd[15]    com.apple.kextd    Error    Failed to load //System/Library/Extensions/AppleUSBEthernetHost.kext - (libkern/kext) requested architecture/executable not found.

I compare the content of AppleUSBAudio.kext :

AppleUSBEthernetHost.kext

total 0

0 drwxr-xr-x    3 root  wheel   102 29 jul 22:48 ./

0 drwxr-xr-x  235 root  wheel  7990 11 sep 21:10 ../

0 drwxr-xr-x    6 root  wheel   204 29 jul 22:48 Contents/

./Contents:

total 16

0 drwxr-xr-x  6 root  wheel   204 29 jul 22:48 ./

0 drwxr-xr-x  3 root  wheel   102 29 jul 22:48 ../

8 -rw-r--r--  1 root  wheel  3202 29 jul 22:48 Info.plist

0 drwxr-xr-x  3 root  wheel   102 29 jul 22:48 MacOS/

0 drwxr-xr-x  3 root  wheel   102 29 jul 22:48 _CodeSignature/

8 -rw-r--r--  1 root  wheel   473 29 jul 22:48 version.plist

./Contents/MacOS:

total 128

  0 drwxr-xr-x  3 root  wheel    102 29 jul 22:48 ./

  0 drwxr-xr-x  6 root  wheel    204 29 jul 22:48 ../

128 -rwxr-xr-x  1 root  wheel  63024 29 jul 22:48 AppleUSBEthernetHost*

./Contents/_CodeSignature:

total 8

0 drwxr-xr-x  3 root  wheel   102 29 jul 22:48 ./

0 drwxr-xr-x  6 root  wheel   204 29 jul 22:48 ../

8 -rw-r--r--  1 root  wheel  3668 29 jul 22:48 CodeResources

...with the content of "AppleUSBAudio.kext" :

total 0

0 drwxr-xr-x    3 root  wheel   102 26 fév  2010 ./

0 drwxr-xr-x  235 root  wheel  7990 11 sep 21:10 ../

0 drwxr-xr-x   11 root  wheel   374 14 avr  2012 Contents/

./Contents:

total 48

0 drwxr-xr-x  11 root  wheel   374 14 avr  2012 ./

0 drwxr-xr-x   3 root  wheel   102 26 fév  2010 ../

8 lrwxr-xr-x   1 root  wheel    28 14 avr  2012 CodeDirectory@ -> _CodeSignature/CodeDirectory

8 lrwxr-xr-x   1 root  wheel    31 14 avr  2012 CodeRequirements@ -> _CodeSignature/CodeRequirements

8 lrwxr-xr-x   1 root  wheel    28 14 avr  2012 CodeResources@ -> _CodeSignature/CodeResources

8 lrwxr-xr-x   1 root  wheel    28 14 avr  2012 CodeSignature@ -> _CodeSignature/CodeSignature

8 -rw-r--r--   1 root  wheel  3199  8 jui  2011 Info.plist

0 drwxr-xr-x   3 root  wheel   102 14 avr  2012 MacOS/

0 drwxr-xr-x   3 root  wheel   102 26 fév  2010 Resources/

0 drwxr-xr-x   6 root  wheel   204 14 avr  2012 _CodeSignature/

8 -rw-r--r--   1 r

MISSING FILES IN "AppleUSBEthernetHost.kext" !!!!!!

Version:

iTunes 11.4 under OS X 10.6.8

Notes:

Configuration:

iTunes 11.4 under OS X 10.6.8

Intel Core 2 Duo 2 Ghz / 1 Go 667 MHz DDR2 SDRAM

My response was directed to, "P33DEE."