Q: iTunes could not backup my iPhone.

You misread my question. I am having the problem when using Yosemite 10.4 and iTunes 12.21. not when using beta software. It works in beta but does not work In Yosemite.

No I am running the beta on a different Mac. I think the problem started after I upgraded Yosemite to 10.3 with iTunes 12.1, if that helps any.

Hi,  I read and tried all the suggestions including emptying the Lockdown folder.  iTunes still says that there is not enough room on the computer, I have 430 GB of free space, and it says that the Sync Server failed to sync.  do you have any more suggestions?

I am not using Wi-Fi syncing.  I have reinstalled iTunes 12.21 and no change.  I then found and deleted the Backup folder in Library/Application Support/MobileSync and reran the backup-sync in iTunes.  I can now backup my iPhone but it still won’t sync the Contacts and Calendars.  I still get the message that the sync server is not working.

I can backup and sync if I switch to a Snow Leopard volume on the same Mac.

Any new suggestions?

Thanks,     Irving

I am not using Wi-Fi syncing.  I have reinstalled iTunes 12.21 and no change.  I then found and deleted the Backup folder in Library/Application Support/MobileSync and reran the backup-sync in iTunes.  I can now backup my iPhone but it still won’t sync the Contacts and Calendars.  I still get the message that the sync server is not working.

I can backup and sync if I switch to a Snow Leopard volume on the same Mac.

Any new suggestions?

Thanks,    Irving