iPhone 3.0 and iTunes error -4
Like many iPhone users, I just downloaded the iPhone 3.0 software and installed it onto my phone. The download and installation went fine, but when I plugged my phone back into my computer I received this error:

Furthermore, my iPhone wasn’t being recognized by iTunes. Coincidentally, this happened to me right after a friend on Twitter was complaining about the issue.
Here’s a solution I found to get iTunes to recognize your iPhone again:
- Quit iTunes
- navigate to System/Library/Extensions and delete AppleMobileDevice.kext (you may be prompted to enter your admin information)
- Restart iTunes
Pretty simple, but here’s the official word from Apple Support, in case you want it.

June 17th, 2009 at 3:29 pm
[...] iPhone 3.0 and iTunes error -4 17.06.2009 | Posted in Computer World Like many iPhone users, I just downloaded the iPhone 3.0 software and installed it onto my phone. The download and installation went fine, but when I plugged my phone back into my computer I received this error: Furthermore, my iPhone wasn’t being recognized by iTunes. Coincidentally, this happened to me right after a friend on Twitter was complaining about the issue. Here’s a solution I found to get iTunes to recognize your iPhone again: Quit iTunes navigate to System/Library/Ext Here is the original post: iPhone 3.0 and iTunes error -4 [...]
June 17th, 2009 at 6:31 pm
[...] Rich Hauck has the solution. 1. Quit iTunes 2. Navigate to System/Library/Extensions and delete [...]