Mac中brew使用时的报错解决方法集锦

一、brew的安装

cd /usr/local/Homebrew/Library/Taps/
mkdir homebrew
cd homebrew
git clone https://mirrors.ustc.edu.cn/homebrew-core.git

二、brew使用中遇到的问题 报错1：直接执行brew命令提示command not found

MACs-MacBook-Pro:bin mac$ brew
-bash: brew: command not found

解决办法：建立软连接 1、全局查找brew文件

find / -iname brew > test

2、 从其中找出非软连接的brew文件，建立软连接

sudo ln -s /Users/mac/xxx/usr/local/Homebrew/Homebrew/bin/brew /usr/local/bin/brew

3、刷新环境变量

sudo vim /etc/profile
export PATH=$PATH:/usr/local/bin   # 添加该内容至/etc/profile文件
source /etc/profile  # 配置修改生效

报错2：brew命令执行提示ln: current/2.6.8: Permission denied 解决办法：修改目录权限

sudo chown -R $(whoami) usr/local  

执行报错：chown: /usr/local: Operation not permitted

关闭rootless，重启macOS按住command+R，进入实用工具-终端，执行以下命令：

csrutil disable
reboot

普通用户再次修改目录权限成功

MACs-MacBook-Pro:Desktop mac$ sudo chown -R $(whoami) /usr/local
Password:
MACs-MacBook-Pro:Desktop mac$ 

sudo chown -R $(whoami) /Users/mac/Desktop/Old_Homebrew

报错3：mac使用brew update更新无反应

http://t.zoukankan.com/sweetXiaoma-p-14337394.html

报错4：brew update 报错 “fatal: Could not resolve HEAD to a revision”

解决办法：https://www.jianshu.com/p/b2de788c3c6d

三、brew安装软件

brew search python
brew install python3

验证python命令安装完成

MACs-MacBook-Pro:~ mac$ python3
Python 3.9.12 (main, Apr 10 2022, 12:20:43) 
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
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