Iphone restore error (-46)

Restart your MacBook, make sure you've followed all the steps from this page: Resolve iOS update and restore errors in iTunes - Apple Support

As a final step, try the recovery mode. Turn your device off, then plug it to your computer with the home button pressed. You will need to have iTunes installed on this computer. Keep the Home button pressed until you see the iTunes logo on the screen of your iPhone. After that on your computer you should see the iTunes window saying your iPhone needs to be restored to factory settings. Click on the restore button.

More info here: https://support.apple.com/en-us/HT201263

Try restoring your iPhone using another Mac.

Also, take a look at this thread: unknown error (46) iPhone 3Gs

I've seen this already and edited my previous post 🙂

Have you tried the recovery mode?

My phone has been disabled when i forgot the passcode. I dont have a choice but to restored my unit and i did this procedure and it worked. You better try this too..