一。brew官网主页上的方法：
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
结果：
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew
Press RETURN to continue or any other key to abort
==> Downloading and installing Homebrew...
remote: Counting objects: 247, done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 247 (delta 196), reused 201 (delta 196), pack-reused 46
Receiving objects: 100% (247/247), 45.99 KiB | 37.00 KiB/s, done.
Resolving deltas: 100% (204/204), completed with 71 local objects.
From https://github.com/Homebrew/brew
96eb404af..3a99e6464 master -> origin/master
HEAD is now at 3a99e6464 Merge pull request #4593 from reitermarkus/curl-options
fatal: unable to access 'https://github.com/Homebrew/brew/': SSLRead() return error -9806
Error: Fetching /usr/local/Homebrew failed!
==> Tapping homebrew/core
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core'...
fatal: unable to access 'https://github.com/Homebrew/homebrew-core/': SSLRead() return error -9806
Error: Failure while executing; `git clone https://github.com/Homebrew/homebrew-core /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core --depth=1` exited with 128.
Error: Failure while executing; `/usr/local/bin/brew tap homebrew/core` exited with 1.
Failed during: /usr/local/bin/brew update --force
结论：安装失败。
注意：无论翻墙与否都链接不上，只能换方法。
二。使用国内镜像
1. 生成文件
cd ~
curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install >> brew_install
编辑生成的文件brew_install，并且修改2个配置项：注释掉BREW_REPO = "https://github.com/Homebrew/brew".freeze和CORE_TAP_REPO = "https://github.com/Homebrew/homebrew-core".freeze
修改为BREW_REPO = "git://mirrors.ustc.edu.cn/brew.git".freeze和CORE_TAP_REPO = "git://mirrors.ustc.edu.cn/homebrew-core.git".freeze
/usr/bin/ruby ~/brew_install
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew
Press RETURN to continue or any other key to abort
==> Downloading and installing Homebrew...
HEAD is now at 3a99e6464 Merge pull request #4593 from reitermarkus/curl-options
==> Tapping homebrew/core
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core'...
remote: Counting objects: 4808, done.
remote: Compressing objects: 100% (4601/4601), done.
remote: Total 4808 (delta 60), reused 568 (delta 16), pack-reused 0
Receiving objects: 100% (4808/4808), 3.89 MiB | 107.00 KiB/s, done.
Resolving deltas: 100% (60/60), done.
Tapped 2 commands and 4593 formulae (4,849 files, 12.2MB).
==> Cleaning up /Library/Caches/Homebrew...
==> Migrating /Library/Caches/Homebrew to /Users/jsecode/Library/Caches/Homebrew...
==> Deleting /Library/Caches/Homebrew...
Already up-to-date.
==> Installation successful!
==> Homebrew has enabled anonymous aggregate user behaviour analytics.
Read the analytics documentation (and how to opt-out) here:
https://docs.brew.sh/Analytics.html
==> Next steps:
- Run `brew help` to get started
- Further documentation:
https://docs.brew.sh
结论：安装成功。
后来在家重新试了下官网方法，又可以安装了。
JSEcodedeMacBook-Pro:nginx shihw$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew
Press RETURN to continue or any other key to abort
==> /usr/bin/sudo /bin/mkdir -p /Library/Caches/Homebrew
Password:
==> /usr/bin/sudo /bin/chmod g+rwx /Library/Caches/Homebrew
==> /usr/bin/sudo /usr/sbin/chown shihw /Library/Caches/Homebrew
==> Downloading and installing Homebrew...
remote: Counting objects: 62, done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 62 (delta 48), reused 51 (delta 48), pack-reused 10
Unpacking objects: 100% (62/62), done.
From https://github.com/Homebrew/brew
28fd59672..545eb91c8 master -> origin/master
HEAD is now at 545eb91c8 Merge pull request #4599 from reitermarkus/download-cache-directory
Updated 1 tap (homebrew/core).
==> Cleaning up /Library/Caches/Homebrew...
==> Migrating /Library/Caches/Homebrew to /Users/jsecode/Library/Caches/Homebrew...
==> Deleting /Library/Caches/Homebrew...
==> New Formulae
gptfdisk pijul
==> Updated Formulae
abcde cython emscripten grpc ocrmypdf ripgrep taskell vcftools yarn
awscli dartsim erlang@20 hashcat openshift-cli rust teleport webpack youtube-dl
cargo-completion dbus gammaray knot-resolver paket shibboleth-sp tmux-xpanes wireguard-tools
chronograf dxpy go-statik liquigraph proselint skaffold todolist xml-security-c
==> Installation successful!
==> Homebrew has enabled anonymous aggregate user behaviour analytics.
Read the analytics documentation (and how to opt-out) here:
https://docs.brew.sh/Analytics.html
==> Next steps:
- Run `brew help` to get started
- Further documentation:
https://docs.brew.sh
JSEcodedeMacBook-Pro:nginx shihw$ brew update
Already up-to-date.
JSEcodedeMacBook-Pro:nginx shihw$