I updated my phone to 3.0.1. While the phone works fine as a phone, xcode organizer no longer knows the name of the phone. It also says 3.0.1 is unsupported by this version of xcode.
I downloaded the latest version of xcode and OS (3.1). Now, I'm trying to move my phone from 3.0.1 to 3.1. I'm pressing option-restore in iTunes (does this bring in the beta OS?). It tells me all the data on my phone will be erased.
How should I proceed?
No. Just type the following line into the terminal (make sure you are logged in as an admin):
ln -s /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0\ (7A341) /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0.1
I would not recommend updating to 3.1 unless there are specific 3.1 features that you would like to use in your app.
After lots of messing around (with much guidance from people here), I got some understanding of the OSX file system. My files were not set up as expected (maybe because I upgraded XCode to 3.1). If anyone else runs into the same issue, here's what you need to do:
1) Log into your Mac with an Admin account and launch the Terminal application (/Applications/Utilities)
2) Check to see where your system keeps files for supporting iPhone 3.0:
ls -l /Developer/Platforms/iPhoneOS.platform/DeviceSupport/
3) Look for a file like 3.0. You may see "3.0" (like me), "3.0 (7A341)", or something else
4) Make a link so XCode looks for 3.0.1 in the 3.0 location. Some examples:
ln -s /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0 /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0.1
ln -s /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0\ \(7A341\) /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0.1
5) Confirm this works by restarting XCode and opening the organizer
As Benjamin points out, do not upgrade to 3.1 unless really needed.