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My iPhone keeps disconnecting from my MacBook Pro; in fact any iPhone I try to connect (and with different cables) can never connect to it.

I am very familiar with command line and Linux so please if anyone has any pointers on what could be going on here feel free to post commands or locations where I can try find the source of this issue.

MacBook Specs: Sierra 10.13.3 MacBook Mid 2015 2.2 GHz Intel Core i7

iPhone 6s Plus / although I have tried with iPhone 5 and iPhone 6 as well as 3 different cables.

tail -f /var/system.log output is as follows

        Jan 25 12:21:05 MyMac PrintUITool[488]: notify name "com.apple.system.powersources.source" has been registered 320 times - this may be a leak
        Jan 25 12:21:08 MyMac fud[1256]: objc[1256]: Class MobileAssetUpdater is implemented in both /System/Library/PrivateFrameworks/MobileAccessoryUpdater.framework/Support/fud (0x10878de10) and /System/Library/AccessoryUpdaterBundles/ApplePowerAccessoryUpdater.bundle/Contents/MacOS/ApplePowerAccessoryUpdater (0x1087df8f8). One of the two will be used. Which one is undefined.
        Jan 25 12:21:22 MyMac PrintUITool[488]: notify name "com.apple.system.powersources.source" has been registered 340 times - this may be a leak

When I plug in iTunes it still keeps doing the same thing but the error reports are as follows:

        Jan 25 12:30:22 MyMac PrintUITool[488]: notify name "com.apple.system.powersources.source" has been registered 840 times - this may be a leak
        Jan 25 12:30:44 MyMac PrintUITool[488]: notify name "com.apple.system.powersources.source" has been registered 860 times - this may be a leak
        Jan 25 12:30:56 MyMac com.apple.BKAgentService[1584]: DEPRECATED USE in libdispatch client: Setting timer interval to 0 requests a 1ns timer, did you mean FOREVER (a one-shot timer)?
        Jan 25 12:30:56 MyMac iTunes[1582]: info> Scale factor of main display = 2.0
        Jan 25 12:30:57 MyMac iTunes[1582]: Entered:_AMMuxedVersion2DeviceConnected, mux-device:8
        Jan 25 12:30:57 MyMac iTunes[1582]: tid:4e07 - unable to query device capabilities
        Jan 25 12:30:58 MyMac iTunes[1582]: Entered:_AMMuxedDeviceDisconnected, mux-device:8
        Jan 25 12:30:58 MyMac iTunes[1582]: tid:1fc0f - Failed to extract ChipID from booted device
        Jan 25 12:30:58 MyMac iTunes[1582]: Failed to connect to device for lockdown query
        Jan 25 12:30:58 MyMac iTunes[1582]: tid:1fc0f - Failed to extract ECID from booted device
        Jan 25 12:30:58 MyMac iTunes[1582]: tid:1fc0f - Proxy returned empty ECID
        Jan 25 12:30:58 MyMac iTunes[1582]: tid:1fc0f - Can't generate fake tracking identifier for device that's not of type recovery or DFU
        Jan 25 12:30:58 MyMac iTunes[1582]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:8
        Jan 25 12:30:58 MyMac iTunes[1582]: tid:1fc0f - Can't handle device disconnection since this device is not tracked
        Jan 25 12:30:59 MyMac iTunes[1582]: Entered:_AMMuxedDeviceDisconnected, mux-device:9
        Jan 25 12:30:59 MyMac iTunes[1582]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:9
        Jan 25 12:30:59 MyMac iTunes[1582]: tid:1fc0f - Mux ID not found in mapping dictionary
        Jan 25 12:30:59 MyMac iTunes[1582]: tid:1fc0f - Can't handle disconnect with invalid ecid
        Jan 25 12:31:01 MyMac iTunes[1582]: Entered:_AMMuxedVersion2DeviceConnected, mux-device:10
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:1fc0f - unable to query device capabilities
        Jan 25 12:31:01 MyMac iTunes[1582]: Entered:_AMMuxedDeviceDisconnected, mux-device:10
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:4e07 - Failed to extract BoardID from booted device
        Jan 25 12:31:01 MyMac iTunes[1582]: Failed to connect to device for lockdown query
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:4e07 - Failed to extract ChipID from booted device
        Jan 25 12:31:01 MyMac iTunes[1582]: Failed to connect to device for lockdown query
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:4e07 - Failed to extract ECID from booted device
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:4e07 - Proxy returned empty ECID
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:4e07 - Can't generate fake tracking identifier for device that's not of type recovery or DFU
        Jan 25 12:31:01 MyMac iTunes[1582]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:10
        Jan 25 12:31:01 MyMac iTunes[1582]: tid:4e07 - Can't handle device disconnection since this device is not tracked
        Jan 25 12:31:01 MyMac iTunes[1582]: failed to connect to USB device 0x60c0001b7f40, UDID ddda699531d5203e0a1fd580430d0f60df6a3353 (0xE8000084)
        Jan 25 12:31:01 MyMac PrintUITool[488]: notify name "com.apple.system.powersources.source" has been registered 880 times - this may be a leak
        Jan 25 12:31:03 MyMac iTunes[1582]: Entered:_AMMuxedVersion2DeviceConnected, mux-device:11

dmesg outputs these lines multiple times:

    NCM Data: family specific matching fails
    AppleUSBInterface: family specific matching fails
    Apple USB Multiplexor: family specific matching fails
    NCM Control: family specific matching fails
    AppleUSBInterface: family specific matching fails

I'm trying to build an app at the moment so not being able to test on a real device is a pain, has anybody managed to fix this or come across it before?

  • 1
    If you use the Xcode Device Manager and connect the iPhone, does it get listed? - How long time is it in the list before it disconnects? - What kind of error message do you get in Xcode? – jksoegaard Jan 25 '18 at 14:20
  • No device gets listed, it just flashes for a few milliseconds then disappears.. i dont see an error in xcode anywhere – Kravitz Jan 25 '18 at 16:00
  • What do you mean by "flashes"? Where does it "flash"? (in the device list in the organizer in Xcode, or?) ... Did you try a different USB port on the Mac? – jksoegaard Jan 25 '18 at 16:17
  • it displays then disappears. yes ive tried multiple cables but no luck – Kravitz Jan 25 '18 at 18:08
  • I've had a very similar problem once that was solved simply by rebooting the Mac. I think it came after VMware crashed while having a USB device attached. Have you tried simply rebooting? – jksoegaard Jan 25 '18 at 19:09

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