If I run this I get
Operation not permitted:
ls -al ~/Library/Application\ Support/MobileSync
This is off limit to safeguard the backup, but it is owned by me, hence I should be able to run this to find out how much storage
MobileSync is taking:
sudo du -hs ~/Library/Application\ Support/MobileSync
But even that fails. Why am I unable to sudo past permissions?
After upgrading to a new MacBook Pro, I see that the iPhone (the iPhone remains the same) has its music collection backed-up.
With the old MacBook Pro my music collection was on the main disk.
On the new MacBook Pro, it's on an external disk, but I still want to sync music from MB to iPhone, and not to back-up the music back on MacBook Pro (which would be silly).
sudo will help in getting to the bottom of this.