Does updating to Mavericks install iTunes 11?

That is crazy - that reverting ONE program can break the whole App Store functionality.

But maybe there's a way to downgrade that doesn't affect App Store?

I guess you can't know yet, but do you suspect that the Software Update also won't work, or do you think it will be just the App Store?

So when I boot now I'm getting an error message that pops up all the time, even if I click "ignore" again and again:

"com.apple.iTunesLibraryService quit unexpectedly - click reopen to open the application again"

I would think that starting iTunes (10.7) would take care of it, but no - even when iTunes is open the error message randomly appears, though not as frequently as before I start iTunes for the first time after booting.

Is com.apple.iTunesLibraryService needed, or is it possible to completely disable it?

"That is crazy - that reverting ONE program can break the whole App Store functionality."

On OS X, iTunes is not just a program, it's a subsystem. There's a whole bunch of other stuff that gets installed along with it to make it work. When you revert to 10.7, you re-install a bunch of old, and now incompatible libraries, and that ends up breaking the MAS.

"I guess you can't know yet, but do you suspect that the Software Update also won't work, or do you think it will be just the App Store?"

There is no more Software Update. All official system updates in OS X now come via the MAS, so if the MAS is broken, you won't be getting any updates or security fixes. There may be a way around that via the command line (enterprise system admins need a less resource intensive way to push updates), but that won't be the standard delivery mechanism.

Yes

Sounds like the xpc file is messed up, I have a copy that I have uploaded to dropbox that will fix your issue

https://www.dropbox.com/sh/kh6mzorwqe56f0a/0-CCQMCb1P

Do a search on your Mac for com.apple.iTunesLibraryService

(mine was located in /Library/Frameworks/iTunesLibrary.framework/Versions/A/XPCServices and is for iTunes 11.1.2)

right click the file and choose open in Enclosing folder

copy and paste the file you downloaded from my dropbox account and replace the file.

MD5 = 85f476702bc3b111d42e89cf37121ff0

^ for super paranoid people that would like to check the hash with another working Mavericks iTunes 11.1.2 com.apple.iTunesLibraryService.xpc file

Thanks! Actually I reverted to OS X 10.8.5 (with CCC) because not only did I get that error, but everything just felt much slower as well.

But I'll keep the link in case I update to 10.9 - I wanna wait and see what others are posting first.

no, i'm staying on itunes 10.7 )))

Thanks.Did not work for me.Subsecuently moved the initial file back in place.😕

A solution for re-installing iTunes 10.7 in Mavericks:

http://forums.macrumors.com/showthread.php?t=1667115

FYI, I upgraded to Mavericks from Mountain Lion on my 13" Macbook Air (late 2012 model). This 'upgraded' my iTunes 10.7 to iTunes 11 automatically, which I was gutted about.

I thought I would try and see if I could go back to iTunes 10.7, and three days later I can say YES, iTunes 10.7 works fine under Mavericks. (NB. I do not own an iPad or iPhone, so I have no experience of which version of iTunes they now require. I do however have an iPod Nano (7th Gen, the newest one) and this is still working perfectly with iTunes 10.7 under Mavericks.

Of course, do a time machine back up first/back up your music folder to another hard drive. I would do this before you upgrade to Mavericks.

How I did it:

1. Locate and save a copy of your iTunes Library.itl file. Luckily I still had one on an external harddrive, because when I upgraded to Mavericks I lost my iTunes 10.7 Library.itl file.

2. Download App Zapper, and zap iTunes 11.

http://www.appzapper.com

3. Download an iTunes 10.7.dmg file.

http://support.apple.com/kb/DL1576?viewlocale=en_US&locale=en_US

4. I used Pacifist 3.0.10. (a newer version is available, just saying what I used) to open the iTunes 10.7.dmg

http://www.charlessoft.com/pacifist_olderversions.html

(NOTE: for every option Pacifist presents you when unpacking the iTunes 10.7.dmg, select 'replace', not 'upgrade')

At first iTunes 10.7 crashed, and I thought this was gonna be a sign of things to come, but I just forced quit, turned the laptop off and back on again, reloaded 50GB of music from my external hard drive, and it has been playing ever since without a glitch!

try to downlaod any app in MAS ))) i suppose u can't do that

True, it seems I can't download anything from the App Store. Before I reinstalled iTunes 10.7 I updated everything, and have got my mac pretty much as I want it, so I think I will just have to stay as I am now!

I just wanted to confirm to folks that this advice fixed the "com.apple.iTunesLibraryService quit unexpectedly" problem! And switching the CoreFP files (then rebooting) has fixed the Appstore/iTunes 10 conflicts for me. 🙂

Docjr08 wrote:

Sounds like the xpc file is messed up, I have a copy that I have uploaded to dropbox that will fix your issue

https://www.dropbox.com/sh/kh6mzorwqe56f0a/0-CCQMCb1P