2017年5月18日星期四

iTunes can not connect this iphone, problem

Reset iTunes Lockdown Certificates in Mac OS X and Windows


Step #1. Very first thing you'll need to do is to quit iTunes and remove any iOS devices attached to your Mac or Windows PC.
Step #2. Now go to the Lockdown directory from the location discussed above depending on your device and OS.
Step #3. Select all the files in the Lockdown folder and delete them. This step might require you to enter your administrator password depending on the privileges you have set.
Step #4.  
sudo chmod go+w  /private/var/db/lockdown or chmod 777 of the lockdown dir.  
This changes the folder so that group (g) and other (o) have write access.
That's it; the certificates have been reset and you'll need to trust the computer once again when you connect an iOS device with iTunes. We have already mentioned earlier, but we would like to warn again to not mess with these files unless and until it is required.
Locate Lockdown folder on Mac
The Lockdown folder on Mac is located at:
/private/var/db/lockdown/
Lockdown folder in Windows XP
C:\Documents and Settings\All Users\Application Data\Apple\Lockdown
Lockdown folder in Windows Vista
C:\Users\USERNAME\AppData\roaming\Apple Computer\Lockdown
Lockdown folder in Windows 7, Windows 8, and Windows 10
C:\ProgramData\Apple\Lockdown

How to ‘UnTrust’ All Computers from iPhone & iPad

How to Reset the “Trust This Computer” Alert and UnTrust All Computers from iOS

This resets all trusted computers from any iPhone, iPad, or iPod touch running iOS 8 or later:
  1. Open the Settings app on the iPhone, iPad, or iPod touch
  2. Go to “General” then to “Reset”
  3. Tap on “Reset Location & Privacy”, enter the devices passcode, and confirm that you wish to reset all location and privacy settings on the iOS device
  4. Exit out of Settings when complete (perhaps after you reconfigure the location and privacy customizations you had prior to the reset)


How to Reset iTunes Lockdown Certificates in Mac OS X and Windows

How to Reset iTunes Lockdown Certificates in Mac OS X and Windows

Step #1. Very first thing you'll need to do is to quit iTunes and remove any iOS devices attached to your Mac or Windows PC.
Step #2. Now go to the Lockdown directory from the location discussed above depending on your device and OS.
Step #3. Select all the files in the Lockdown folder and delete them. This step might require you to enter your administrator password depending on the privileges you have set.
That's it; the certificates have been reset and you'll need to trust the computer once again when you connect an iOS device with iTunes. We have already mentioned earlier, but we would like to warn again to not mess with these files unless and until it is required.

Locate Lockdown folder on Mac
The Lockdown folder on Mac is located at:
/private/var/db/lockdown/
Lockdown folder in Windows XP
C:\Documents and Settings\All Users\Application Data\Apple\Lockdown
Lockdown folder in Windows Vista
C:\Users\USERNAME\AppData\roaming\Apple Computer\Lockdown
Lockdown folder in Windows 7, Windows 8, and Windows 10
C:\ProgramData\Apple\Lockdown