Inoltre, hai seguito anche le istruzioni successive della pagina di riferimento? (
https://support.apple.com/en-us/HT200281)
1. From the top level of your startup disk, go to
Users/Shared/Library/ (
Utenti/Condivisa/Library/ in italiano)
2. In the Libary folder, select the
Application Support folder, then choose
File > Get Info (
File > Ottieni Informazioni in italiano)
3. The Application Support Info window will open. In the Sharing & Permissions section of the window, update the privilege settings as needed to give each item "Read & Write" privileges.
4. Restart your computer.
p.s. ho modificato il titolo del topic