I got a question ----->
ericsos-macpro31:~ EricSo$ sudo -s
WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.
To proceed, enter your password, or type Ctrl-C to abort.
Password:
ericsos-macpro31:~ EricSo$ mkdir /Volumes/EFI
mkdir: /Volumes/EFI: File exists
ericsos-macpro31:~ EricSo$ mount_hfs /dev/disk1s1 /Volumes/EFI
mount_hfs: Permission denied
ericsos-macpro31:~ EricSo$ killall Finder
WHAT CAN I DO TO SOLVE THE "PERMISSION DENIED"