1.在终端执行 gem install fir-cli
一直提示错误： You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory.
把 gem install fir-cli 改为 sudo gem install -n /usr/local/bin fir-cli
2.error: exportArchive: The data couldn’t be read because it isn’t in the correct format.
很大可能是你plist配置错误
可参考：https://www.jianshu.com/p/6b68cd9307bc
3. can't find gem fir-cli
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:241:in `bin_path': can't find gem fir-cli (>= 0.a) (Gem::GemNotFoundException)
from /usr/local/bin/fir:22:in `<main>'