Xcode Organizer: can not use iPhone (dyld_shared_c

Question

When plugging my iPhone in and starting the Xcode organizer, a yellow circle next to the device show me that "This device is busy or otherwise unusable by Xcode." The Organizer is then processing two files (the second one takes quite a while to finish) and afterwards I get the error message as shown in the screenshot.

I tried to google for that error message ("dyld_shared_cache_extract_dylibs failed") but could not find anything useful. I tried a couple things: repair permissions of my harddrive and run "sudo update_dyld_shared_cache -force". Still getting the error message.

I am running iOS 4.2.1 and Xcode 3.2.5. I have not updated Xcode after updating from 4.2 to 4.2.1 (I think).

The Xcode console is empty but the regular OS X console shows this:

1/22/11 10:56:19 PM     Xcode[4187]     Started symbol copying process
1/22/11 10:56:19 PM     Xcode[4187]     Skipped copying file 1 of 2 ("processed" sentinal found)
1/22/11 10:56:19 PM     Xcode[4187]     Skipped processing file 1 of 2 ("processed" sentinal found)
1/22/11 10:56:19 PM     Xcode[4187]     Skipped copying file 2 of 2 ("copied" sentinal found)
1/22/11 10:56:19 PM     Xcode[4187]     Started processing file 2 of 2
1/22/11 10:56:20 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:20 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:20 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:21 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:21 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:22 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:22 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:22 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:23 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:23 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib
1/22/11 10:56:23 PM     [0x0-0x4d04d].com.apple.Xcode[4187]     arch already exists in fat dylib

This error message is then repeated constantly.

Answer 1

This happened to me when disk space was very low on the mac

Answer 2

Target path to directory has been changed since Xcode 3.

If you have same issue in Xcode 8 then follow next steps:

1. Delete a directory in ~/Library/Developer/Xcode/iOS DeviceSupport/
   that matches the version of the iOS on your device.
2. Restart Xcode.

Source: Apple Developer Forum

Answer 3

I spend two days looking for the right answer.

I tried unpairing my device and deleting the ~/Library/Developer/Xcode/iOS DeviceSupport/ but nothing didn't work for me. The solution for me was to upgrade my MacOS to the latest version: Catalina 10.15.1. Then I have downloaded the latest Xcode 11.2.1_GM_Seed. I took the device support folder from the new Xcode and I added to my old Xcode.

I guess the device Support in this link has something wrong. Because when I used it I got this error: "dyld_shared_cache_extract_dylibs failed"

PS: This a solution for those who wants to run their project (written on Swift 4) on a real iPhone (OS 13.2)

Answer 4

For what it's worth: I encountered this problem when I was out of disk space. It seems that XCode was the first application to 'notice' by throwing this error. After freeing up some disk space everything worked fine again.

Answer 5

Move your project to an external hard drive and compiled again This happens when you do not have much space on your machine

Answer 6

For me the approach that worked was the one mentioned here which is:

1. Open Finder and go to ~/Library/Developer/Xcode/iOS DeviceSupport/
2. Remove the folder that matches your device and reconnect your phone