1⃣️在Mac上安装Lua的运行环境再简单不过了，如果你的Mac Terminal上安装了Homebrew的话，只需要键入`brew install lua`即可。

longsl-mac:~ longsl$ brew install lua

Updating Homebrew...

==> Auto-updated Homebrew!

Updated 1 tap (homebrew/core).

==> Updated Formulae

acpica              erlang              kubeprod            rust

aliyun-cli          exploitdb           libgweather         sonar-scanner

ask-cli             freetype            libpqxx             sonarqube

azure-cli           glooctl             micronaut           terrahub

babel               gmsh                opa                 tokei

bzip2               grpcurl             paket               ucloud

cargo-completion    gxml                phpunit             xsimd

clojure             hadolint            podofo              ykpers

cointop             hamlib              postgresql          zurl

convox              helmfile            proguard

django-completion   jboss-forge         pushpin

==> Downloading https://homebrew.bintray.com/bottles/lua-5.3.5_1.mojave.bottle.t

######################################################################## 100.0%

==> Pouring lua-5.3.5_1.mojave.bottle.tar.gz

==> Caveats

You may also want luarocks:

  brew install luarocks

==> Summary

????  /usr/local/Cellar/lua/5.3.5_1: 28 files, 274.5KB

longsl-mac:~ longsl$ lua

Lua 5.3.5  Copyright (C) 1994-2018 Lua.org, PUC-Rio

> math.pi / 4

0.78539816339745

2⃣️假如你的Mac上没有安装上面提到的Homebrew软件，那也没关系，直接编译lua源代码库就可以了。

Take Lua 5.2 as example: 

1. Open your Terminal.app
2. wget http://www.lua.org/work/lua-5.3.0-work3.tar.gz
3. tar xvzf lua-5.3.0-work3.tar.gz
4. cd lua-5.3.0-work3/src
5. make macosx(I believe you have Xcode installed)

After that, you can see 'lua' binary under current dir.

 sudo cp lua /usr/bin/lua

参考：https://stackoverflow.com/a/5496362