Upgraded to iTunes 11.4 and now it won't sync my iPhone 5s-sync button is greyed out.

I'm not all that technical so had trouble understanding cwa2, but I just got it working by:

1) Deleting the following (hold Option after bringing up the context ("right-click") menu to expose the "Show Package Contents" option if necessary):

/Library/Frameworks/iTunesLibrary.framework

Note that this is the top-level Library folder, not the one in your own user home folder.

/System/Library/CoreServices/CoreTypes.bundle/Contents/Library/MobileDevices.bu ndle

/System/Library/Extensions/AppleMobileDevice.kext

/System/Library/Extensions/AppleUSBEthernetHost.kext

Note for the rest: frameworks are folders, not specific files; just delete the folder in the location as specified by the following paths:

/System/Library/PrivateFrameworks/AirTrafficHost.framework

/System/Library/PrivateFrameworks/CoreFP.framework

/System/Library/PrivateFrameworks/DeviceLink.framework

/System/Library/PrivateFrameworks/iTunesAccess.framework

/System/Library/PrivateFrameworks/MobileDevice.framework

Thank you, cwa2, for tracking down these specifics.

2) Downloading and installing an old iTunes 10.3.1 from here:

http://www.v3.co.uk/v3-uk/download-review/1957301/apple-itunes-for-mac-1110

I'd just like to say to Apple, thanks for nothing throwing 32-bit users under the bus like this! It won't even work for customers who just bought your newest mobile devices so it's not like you aren't hurting your newest customers, still!!!!! Were I a developer, of _course_ I'd detest 32-bit compatibility this late, but this is a _CATASTROPHIC_ bug affecting buyers of your NEWEST hardware, and only requires maintenance of a handful of resource files!!!

In addition to success with the new iPad upgraded to IOS 8.0, I just finished complete backup and sync of iPhone 5s, then upgrade to IOS 8.0, followed by another backup and sync. All with iTunes 11.2.2.

It appears, at least in my case with my 32-bit iMac, that there is no need for a newer version of iTunes after 11.2.2; I suspect even 11.3 has begun the move by Apple to force us off the older 32-bit machines.

Of course, I don't know what will happen with an iPhone 6 or 6 Plus. Has anyone gotten the new model and synced with a 32-bit Intel iMac?

I have the iPhone 6 syncing with 11.4 on OS X 10.6.8. I used a version of AirTrafficHost.framework from the 11.3 install, and a version of AppleUSBEthernetHost.kext from a rather older version (see my earlier post for details). After a reboot, this worked for me. 11.3 on it's own was enough to enable syncing, even though the AppleUSBEthernetHost.kext from it couldn't be loaded, but it was not compatible with the iPhone 6.

And is your mac a 32bit mac?

I am not sure 32 bit is the problem. I have a 2013 27" iMac running 10.9.5, and an iPad air and iPhone 6, both running IOS 8. Neither IOS device would show up in the iTunes device list starting yesterday. If I plugged them into the iMac, they showed up and would sync, but the instant they were unplugged, they disappeared from the device list.

I tried the relatively simple attempt of unchecking the update via wifi box for the iPhone, quitting iTunes, restarting iTunes and checking the update box, quitting iTunes a second time, restarting a second time and VIOLA, the iPhone 6 now shows up without a direct attachment. Still works this AM. Never had the greyed out sync button.

BUT this doesn't work for the iPad air -- have yet to check every single setting on both IOS to make sure some minor difference exists, but....

SUCCESS!!. I toggled the wifi button on and off about 8 times, iTunes quit, and when it restarted, the iPad was recognized on wifi. the iPhone continues to be recognized, so all is well. Never heard that toggling a button until the app quit was a solution, but it was this time.

Yes, Intel Core Duo Mac Mini 1.83Ghz running OS X 10.6.8. Having a 32-bit system is DEFINITELY a problem with iTunes 11.3 (which can still sync) and iTunes 11.4 (which completely fails) due to the AppleUSBEthernetHost.kext being only 64-bit compatible.

Will Apple ever fix this are we stuck with us forever?

I can't do that about that's way beyond my computer skills.

Apple needs to fix this so we can able to use it.

Or is this a way for them to force us to buy a new computer?

My 27 inch mid 2011 works just fine thank you.

Now and my okay to get iOS 8 from my iPod touch fifth-generation? Or is it going to screw that up. I haven't gone there yet.

I had a similar sync issue with iOS 8.0 on my new iPhone 6 Plus 128. Three hours trying to add music and no go. Frustrated and tired, I slept on it and this morning I remembered that this seems a problem with every major iOS release and remembered what I was told to do then! So here's what I did and now everything is fine on all of my devices with regard to synching. Go to Setting-General-(bottom of the page) Reset-Reset Network Settings-Device Passcode-Reset Network Settings. Let the device do that and restart. Try again this should clear the problem. Up until this point the device and iTunes didn't even know each other from Adam. By this I mean that the amount of space available between device and iTunes and device itself was all messed up. Now everything is running smoothly. What does Network Settings have to do with anything, I have no clue just know it worked. Good luck. You'll have to retype your WiFi password after doing this.

I am going to wait till Apple fixes it and then I will go to IOS 8...

This thread has a few posts, such as this one, that are for issues not related to the lack of 32-bit support in iTunes 11.4. There definitely are many other things that can cause your devices not to sync properly!

The specific symptom in this case is the "Sync" button is greyed-out, and cannot be clicked. If you try to take a backup of the device, the status window will show "Backing up Iphone" or whatever for about a second, then go back to idle.

If you look in the system log (/var/log/system.log or the Console app) you will see many errors related to AppleUSBEthernetHost.kext not being able to be loaded. This is a kernel extension that provides network connectivity using USB devices, and apparently is used in some cases to sync IOS devices. I'm not sure exactly how.

This issue ONLY affects 32-bit OS X systems, which by definition are running Snow Leopard because it was the last OS X version with 32-bit support. OS X Lion (10.7) and newer are all 64-bit only, so if you are upgraded to them you are experiencing a different problem.

If you have any other symptoms than those (apps or music gets removed during sync, or your device does not appear in iTunes at all, or it works with USB but not using WiFi Sync, etc) you have a different problem possibly in addition to this one.

iTunes 11.2 and below work fine as far as I know. iTunes 11.3 allows you to sync still, and includes a 32-bit AppleUSBEthernetHost.kext, but that kernel extension is unable to be loaded because it is not compatible with the Snow Leopard kernel. iTunes 11.4 includes only a 64-bit AppleUSBEthernetHost.kext and is also not compatible with the Snow Leopard kernel.

There is also some issue with the AirTrafficHost.framework system bundle, but I'm not sure what it is. The version from iTunes 11.4 does not load properly when iTunes is launched, and just repeatedly dies.

Apple stopped properly supporting 32-bit hardware years ago (i.e. no OS upgrades), but they claim to still support it on their site. They need to either stop pretending to support it, or actually test the software they are releasing on our older systems and fix issues like this promptly. I'm not betting on the latter.

"If you look in the system log (/var/log/system.log or the Console app) you will see many errors related to AppleUSBEthernetHost.kext not being able to be loaded. This is a kernel extension that provides network connectivity using USB devices, and apparently is used in some cases to sync IOS devices. I'm not sure exactly how.

This issue ONLY affects 32-bit OS X systems"

"iTunes 11.2 and below work fine as far as I know. iTunes 11.3 allows you to sync still, and includes a 32-bit AppleUSBEthernetHost.kext, but that kernel extension is unable to be loaded because it is not compatible with the Snow Leopard kernel. iTunes 11.4 includes only a 64-bit AppleUSBEthernetHost.kext and is also not compatible with the Snow Leopard kernel."

Please stop making unfounded assertions like this. I am on a 2010 Mac Pro (64-bit) and had the "AppleUSBEthernetHost.kext could not be loaded" issue when I first updated to iTunes 11.4 via Software Update; after that I removed it and installed iTunes 11.4 and everything syncs just fine. Just because someone is still running Snow Leopard doesn't mean they didn't have an issue or are still having issues.

There are multiple issues involved, some of them are 32-bit-isms, some are just related to the busted AppleUSBEthernetHost.kext kext itself, and who knows what else. (I also had the same problem on a 2012 Mac mini running Mac OS X 10.8.4 Server.)

I got the same thing, see my issue: Re: System extension cannot be used and I am running a mid 2011, 27 inch iMac running OS 10.8.5

I am a novice and have a few questions. There were a lot of posts about Pacifist and terminal. I am not sure how to do any of that. Do you need the Pacifist program to delete the files you mentioned or can I just find them where you indicated and delete them manually by dragging them to the trash?

Where can I get 11.3 or an earlier version to install?

Are all 10.6.8 machines 32 bit? I have one desktop that is really old that I am sure is because it gave me the error. Initially I just trashed the file from the library and reinstalled 11.4 from the apple site. It opened fine, but I read people were still having issues so I was afraid to connect any devices to test it. Then your post came out about deleting all those files and reinstalling 11.3 which seems like a good idea. We also have 2 older laptops as well that aren't as old running 10.6.8 is there somewhere to find out if they are 32 bit? Luckily I did not upgrade one, but the other is my sons at college and if he did upgrade I want to be able to send him this info as well.

11.4 update was released one month after 11.3.1, if we dont have another update in less than a month, we are alone, many software developers have said, support for 10.6 Snow leopard will stop soon, be ready

sad but it is the ways are 😕