Problem with unknown error

Hello JackieCharlton,

Thanks for reaching out in Apple Support Communities. It looks like you're getting an iTunes error message. We're happy to help. Are you getting this message when you try to update or restore an iOS device? This can help us determine our next troubleshooting steps.

Check out the following support articles:

If you see an error in Finder or iTunes on your computer

Find an iTunes or the Finder error code

Cheers!

JackieCharlton Said:

"I also have this problem which I cannot resolve even though I have tried downloading over months! It will not complete and I cannot get the upgrade which I would have thought I could. I sits in my Settings box asking me to upload."

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Try a Temporary Admin:

Have you tried creating a new user? You would create a new Administrator, and would attempt an install using that user. See if that does the trick.

First, Back up your Mac:

Important: Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall. Use an external Hard Drive of at least 1.5 times the size of your internal hard drive.