当我尝试在我的新 Mac 机器上安装 Rails v 6.1.1（仍在 Catalina 上，而不是 Big Sur 上）时，我收到一条错误消息，我找不到解决方案
我已经安装了 rbenv 和 Homebrew，并且已经更新到最新版本的 Ruby (3.0.0)。当我推出时，which ruby我得到：/usr/local/opt/ruby/bin/ruby
这是我运行时在终端中看到的错误代码gem install rails -v 6.1.1（sudo安装时出现相同错误）：
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
current directory: /usr/local/lib/ruby/gems/3.0.0/gems/mimemagic-0.3.10/ext/mimemagic
/usr/local/opt/ruby/bin/ruby -I/usr/local/lib/ruby/site_ruby/3.0.0 -rrubygems /usr/local/Cellar/ruby/3.0.0_1/lib/ruby/gems/3.0.0/gems/rake-13.0.3/exe/rake RUBYARCHDIR\=/usr/local/lib/ruby/gems/3.0.0/extensions/x86_64-darwin-19/3.0.0/mimemagic-0.3.10 RUBYLIBDIR\=/usr/local/lib/ruby/gems/3.0.0/extensions/x86_64-darwin-19/3.0.0/mimemagic-0.3.10
rake aborted!
Could not find MIME type database in the following locations: ["/usr/local/share/mime/packages/freedesktop.org.xml", "/opt/homebrew/share/mime/packages/freedesktop.org.xml", "/opt/local/share/mime/packages/freedesktop.org.xml", "/usr/share/mime/packages/freedesktop.org.xml"]
Ensure you have either installed the …I wanted to install ruby on rails for windows 10, following the same instructions of this video: https://www.youtube.com/watch?v=G-B_KUFNkQQ
When it finish the installation of ruby, I return to the console and after gem install rails, I get this error:
C:\Users\Usuario>gem install rails --no-document
Temporarily enhancing PATH for MSYS/MINGW...
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
current directory: C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/mimemagic-0.3.9/ext/mimemagic
C:/Ruby27-x64/bin/ruby.exe -IC:/Ruby27-x64/lib/ruby/2.7.0/rubygems -rrubygems C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/rake-13.0.1/exe/rake RUBYARCHDIR\=C:/Ruby27-x64/lib/ruby/gems/2.7.0/extensions/x64-mingw32/2.7.0/mimemagic-0.3.9 RUBYLIBDIR\=C:/Ruby27-x64/lib/ruby/gems/2.7.0/extensions/x64-mingw32/2.7.0/mimemagic-0.3.9
rake aborted!
Could not …