iPhone > Mac Laptop won't sync after update: "Trust this computer" message on repeat?

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iPhone > Mac Laptop won't sync after update: "Trust this computer" message on repeat?

Looks like many PC users have a fix for this problem but I haven't seen anything specific for the Mac.

Last night, I installed the latest upgrade 7.1 my iPhone 5. When I connect to my main laptop (Mac Book Pro, Intel Core 2 Duo processor and running on OSX 10.9.2), I'm asked if I want "Trust This Computer?". I select TRUST, wait about 30 seconds and it asks again. I'm stuck in a loop.

I'm using the offical iPhone cable, rebooted my phone and my laptop, reset my iPhone settings, reinstalled iTunes on the laptop and still no success.

As a test, I pulled out my second laptop, which I travel with, and it trusted that device so I guess the issue is a laptop issue.

Any suggestions?

iPhone 5, iOS 7.1

Posted on Mar 13, 2014 5:21 PM

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Answer 1

Best reply

plant_geek

Level 1

14 points

Mar 15, 2014 10:59 PM in response to Patukka

Hey Patukka,

I've got the same problem on my iPhone 5s trying to sync to my 2011 Macbook air. It only happened after I updated iOS to 7.1. I spent about an hour and half on the phone with Apple support today. They sent the problem to the engineers b/c the lead tech support (on both OS and iOS staff) couldn't figure it out. They downloaded a bunch of system info and were going to go through it. I'll let you know what I hear back, if they fix it.

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Answer 2

Theoimac

Level 1

0 points

Mar 16, 2014 4:35 AM in response to plant_geek

Hey,
Same problem here. It is the combination of IOS 7.1 and 10.9.2

No sync on my Mac Mini and iPhone 4s with 10.9.2 and IOS 7.1

Sync on my iMac 10.9.1 and the iPhone works fine.

I hope that the Apple guys solve this problem quickly.

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Answer 3

Mar 16, 2014 9:04 AM in response to Theoimac

You must be right. I'm running the same combination: iOS 7.1 (on a iPhone 5s) and OS 10.9.2 (on a 2011 Macbook Air). I have an iPad Air that's using iOS 7.0 and has not had problems syncing to the Macbook Air.

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Answer 4

Kp5609

Level 1

0 points

Mar 16, 2014 11:17 AM in response to Patukka

Same problem it is a firmware issue.

iPhone 4(CDMA) 32gb

MacBook Pro OSX 10.9.2 (Mid 2012)

I talked to a local apple rep. we restore both iphone and mac, no dice. Hope they fix this soon, really bugging me out!!

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Answer 5

Mar 18, 2014 1:12 PM in response to Kp5609

Hey, the Apple rep got back to me today after an engineer looked through some of my error logs. The rep said to try this on mine. I'm not home, so I can't try it yet but will. In the mean time, you might try it - no guarantees though:

http://support.apple.com/kb/TS5335?viewlocale=en_US

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Answer 6

Patukka Author

Level 1

1 points

Mar 18, 2014 2:09 PM in response to plant_geek

Sounded promising.

I got to my lockdown folder but found that most of the files there are locked.

I deleted the few that were unlocked but that did not resolve the issue when I plugged in my iPhone. Same story.

Next, I did some quick research on how to unlock 'locked files' and 'plist files.' Tried following the advice I researched using terminal, start up in single user mode and start up in verbose mode. None of the attempts would allow me to unlock the files. Apparently they are off limits.

Hope you have better luck. Let me know what happens for you, planet_geek.

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Answer 7

Kp5609

Level 1

0 points

Mar 19, 2014 7:25 AM in response to plant_geek

tried it, sadly didnt work! 😟 this is getting upsetting! apple needs to get on this ASAP!

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Answer 8

Theoimac

Level 1

0 points

Mar 19, 2014 1:19 PM in response to plant_geek

That worked for me ! Hooray ! 🙂

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Answer 9

Mar 19, 2014 1:38 PM in response to Theoimac

Cool! Glad it worked. I've a got a call in with a rep about getting the admin permissions to delete these files and will post after I hear back.

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Answer 10

Mar 20, 2014 5:54 AM in response to Kp5609

Does not work for me either ...

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Answer 11

Mar 20, 2014 7:32 PM in response to Patukka

Just got it to work!!! If you are unable to delete the lockdown files this might work for you too if you have Mac! A word to the wise though, if you're not comfortable using the command terminal, you may just want to call an Apple rep instead. Here's what the rep had me do:

1) open terminal on your Mac

2) cut and past this command in quotes exactly as it is "sudo chflags -R nouchg /var/db/lockdown"

3) enter your password to verfiy (there is a warning message). Note that you won't see any letters appear when you enter your password. Just hit enter once you've typed it.

3) now go back and follow the directions on the lockdown page:

http://support.apple.com/kb/TS5335?viewlocale=en_US

4) once the plist files are in the trash restart your computer and try connecting your phone.

5) let us know if it works for you!

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Answer 12

Patukka Author

Level 1

1 points

Mar 21, 2014 6:10 PM in response to plant_geek

Thanks for being tenacious, Planet Geek and congrats on your success!

I tried a similiar solution previously but armed with the exact command you offered, I boldly tried again. Unfortunately, it still didn't unlock the files for me.

Those stubborn plist files seem to be permanently locked on my computer. I still get a 'locked file' error when I try to trash them. When I open 'Get Info' on the files, it shows the 'lock box' checked and greyed out (even when I manually unlock the golden lock at the bottom of the info panel.

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Answer 13

Patukka Author

Level 1

1 points

Mar 24, 2014 12:23 PM in response to plant_geek

I stand corrected! This solution worked!! <insert happy dance>

A lightbulb went off in my head when I was no longer thinking about this and I wondered if the Terminal application in Macintosh HD was the same as opening the Terminal application in my user profile. It turns out that was where to find the solution to unlocking the plist files. I wasn't able to unlock the files using the Macintosh HD application but was able to using the user profile application.

Once those files were gone, success with the phone and the laptop trusting each other!

Case closed. I appreciate everyone's help here!

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Answer 14

msalm

Level 1

4 points

Mar 28, 2014 10:32 PM in response to Patukka

I encountered this exact issue with when I upgraded my iphone 5s to 7.1.

Also running my Macbook Pro, Inte i7 on OSX 10.9.2 and got stuck on th the "Trust This Computer Loop." Even after reseting all setting on my iphone. Finally found this thread, but when I tried to go into Terminal, I actually found that I could not do anything in Terminal either.

I kept on receiving an error ending in *** set a breakpoint in malloc_error_break to debug.

Grey bar, cursor just after (Process Complete) line. Even after closing every application and restarting my Macbook.

But running the "Repair Permissions" in Disk Utility and "Verifying Disk Permissions" and then restarted my Macbook, no only was Terminal Repaired but my Macbook recognized my iphone 5s and the :trust This Computer Loop" was broken.

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Answer 15

Mar 29, 2014 8:19 AM in response to msalm

Glad that worked in a round about way. Would you mind clicking the "this solved my problem" button if you haven't already so it's easier for people to find this thread?

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