This is on macOS Mojave. I tried to get the size of directories by using
du -csh */
in my home directory. But the directory Library was giving Operation not permitted. So I used sudo to do it, and it was the same thing.
Then I did
ls -l Library
and saw
drwx------+ 35 peter staff 1120 Mar 11 10:12 Logs/
drwx------@ 3 peter staff 96 Mar 18 2014 Mail/
What does the @ and + mean? The Logs actually allowed access but not Mail.
This is described in the ls manual on macOS:
The Long Format If the -l option is given, the following information is displayed for each file: file mode, number of links, owner name, group name, number of bytes in the file, abbreviated month, day-of-month file was last modified, hour file last modified, minute file last modified, and the pathname. In addition, for each directory whose contents are displayed, the total number of 512-byte blocks used by the files in the directory is displayed on a line by itself, immediately before the information for the files in the directory. If the file or directory has extended attributes, the permissions field printed by the -l option is followed by an @ character. Otherwise, if the file or directory has extended security information, the permissions field printed by the -l option is followed by a + character.
