Issus

Many software will apply the admin permission to possibly use some system tools, so I try to add my account to admin group. ## Solution

• press command + s while boot, then mac will go to single-user-mode as root. This is a terminal interface that allows you to login and interact with your computer via text input only.

• mount the root device as read-write

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fsck -fy
mount -uw /

• edit the sudo user list, and move wluo into it.

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chmod 755 etc/sudoers
vim etc/sudoers  # put "wluo ALL=(ALL) ALL" under "root ALL=(ALL) ALL"

• reboot mac, then open terminal.

• put wluo into admin group

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sudo su
dseditgroup -o edit -a wluo -t user admin