MACBOOK 调教指北

以下都是本人在使用macOS Mojave v10.14.6 实际遇到的问题：

1、切换到root用户

$sudo su
Password:????
sh-3.2# 

2、为系统自带的php安装pcntl扩展

$php -v
No log handling enabled - using stderr logging
Created directory: /var/db/net-snmp
Created directory: /var/db/net-snmp/mib_indexes
PHP 7.1.23 (cli) (built: Feb 22 2019 22:19:32) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies
$curl -O https://www.php.net/distributions/php-7.1.23.tar.gz
$tar zxvf php-7.1.23.tar.gz
$cd php-7.1.23/ext/pcntl
$phpize
grep: /usr/include/php/main/php.h: No such file or directory
grep: /usr/include/php/Zend/zend_modules.h: No such file or directory
grep: /usr/include/php/Zend/zend_extensions.h: No such file or directory
Configuring for:
PHP Api Version:        
Zend Module Api No:     
Zend Extension Api No:  

头文件一个都没有，解决方案，重新安装后即可。

$ xcode-select --install
$ cd /Library/Developer/CommandLineTools/Packages/
$ open macOS_SDK_headers_for_macOS_10.14.pkg

3、/usr/lib不可写问题，root都不行

# cp pcntl.so /usr/lib/php/extensions/no-debug-non-zts-20160303/
cp: /usr/lib/php/extensions/no-debug-non-zts-20160303/pcntl.so: Operation not permitted

因为 新的macOS 启用了 SIP (System Intergerity Protection)功能，导致 root 用户也没有权限修改。Rootless机制将成为对抗恶意程序的最后防线
禁用此项功能步骤如下：

1. 重启电脑
2. command + R 进入 recover 模式
3. 点击最上方的菜单使用工具，选择终端
4. 运行命令 csrutil disable
5. 当出现 successfully 字样代表成功，重启电脑就可以了。

-bash-3.2# csrutil disable
Successfully disabled System Integrity Protection. Please restart the machine for the changes to take effect.
-bash-3.2#

PS:如果需要重新开启这个 SIP 功能，重复上面布置，只是第四步的命令是 csrutil enable。

4、 安装Brew并 修改为国内源

#安装
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
#换源
cd "$(brew --repo)"
git remote set-url origin https://mirrors.aliyun.com/homebrew/brew.git
# 替换homebrew-core.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-core.git
# 刷新源
brew update