Mac Typora安装pandoc详细步骤及安装报错解决办法

Typora是非常好用的markdown软件。如果想实现导出功能

安装步骤

在Typora-帮助- Install and Pandoc

选择mac对应的安装方法

进入后图片如下，有两种，一种是在github上下载，一种是直接在mac的终端用命令行。

github上不去，我选择用命令行安装。

终端命令行：brew install pandoc

输入命令行执行安装命令

报错问题及解决办法

安装过程中会有报错问题。

报错信息

Updating Homebrew...
Traceback (most recent call last):
  10: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `<main>
   9: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `require_relative
   8: from /usr/local/Homebrew/Library/Homebrew/global.rb:28:in `<top (required)>
   7: from /usr/local/Homebrew/Library/Homebrew/global.rb:28:in `require
   6: from /usr/local/Homebrew/Library/Homebrew/os.rb:3:in `<top (required)>
   5: from /usr/local/Homebrew/Library/Homebrew/os.rb:21:in `<module:OS>
   4: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:58:in `prerelease?
   3: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `version
   2: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `new
   1: from /usr/local/Homebrew/Library/Homebrew/os/mac/version.rb:26:in `initialize
/usr/local/Homebrew/Library/Homebrew/version.rb:368:in `initialize: Version value must be a string; got a NilClass () (TypeError)

根据最后一句可得知报错在version.rb:368，即第368行。也就是说版本号需要调整。

/usr/local/Homebrew/Library/Homebrew/version.rb:368:in `initialize: Version value must be a string; got a NilClass () (TypeError)

解决办法

1. 前往文件夹

找到文件夹/usr/local/Homebrew/Library/Homebrew/，打开version.db，将下面的@version改为’10.14.1’。

def initialize(val)
    raise TypeError, "Version value must be a string; got a #{val.class} (#{val})" unless val.respond_to?(:to_str)

    @version = 10.14.1

注意不要升级brew，否则会覆盖掉@version

而更新brew的命令

brew update-reset

2. 重新在终端输入brew install pandoc
3. 解决报错：The following formula pandoc cannot be installed as binary package and must be built from source Updating Homebrew... Error: The following formula pandoc cannot be installed as binary package and must be built from source. Install the Command Line Tools: 在终端中输入： xcode-select --install 会提醒让安装xcode，点击安装，等待安装完成。
4. 再次输入brew install pandoc 安装开始会显示如下图片，等待安装完成。