iTunes 10.4 unexpected error - won't install into OS X 10.7

just curious...how many had the app store icon inactive when attempting the update? My app store app was NOT active...

EXACT same issue. I have the brand new, high end iMac 27.

bump - same problem. still not working after repair permissions. mid-2008 MB.

Sama problem here!

MacBook 13" (late 2008), 8 Gb RAM

I have very low disk space left. Will delete some files and try again. Suggest you check.

I have 1.2TB free.

Same here. Late 2007 MacBook Pro

Same here - only mine is failing *prior* to upgrading to Lion. Currently I'm on Snow Leopard 10.6.8. All other updates install correctly, except for iTunes which gives an "unexpected error". So, maybe a problem with iTunes and not Lion?

same as rlovegreen ...I'm on Snow Leopard 10.6.8 as well... everything installs OK except iTunes...probably a 'get-ready-for-iTunes/Lion' thingo...

same... good this i have windows & snowleopard still installed 😝

..however, i freshinstalled lion a flashdrive & updated itunes with no problem

Same problem here with same setup (brand new imac 27")

Thank you one and all. I thought that I had lost my mind. Hope this gets a fix soon. My Sonos system does not like Lion so I am grounded for now.

OK, just was able to successfully upgrade to iTunes 4 on my MPB running 10.6.8. No problem at all. The above problem only seems to affect my 27" iMac.

hmmm...my no-go iTunes install was on a 27" iMac too

My post above is still true...however i still receive the EXACT same error when trying to install iwork 09... the instalations writes the files, then optimizes, then begins to finish & presented with the same "instalation error"... interesting