锁终端

输入:

<1>cd /Applications/Xcode.app

回车

结果显示: 

Xcode.app

输入: 

<2>sudo chown -hR root:wheel Contents

回车

结果显示:

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:<3>输入密码(单字符,看不见的)

回车结束

unlock 解锁

Xcode 锁终端