安裝go語言的編譯環境，在安裝到 delve時候出現如下錯誤：

If reporting this issue please do so at (not Homebrew/brew or Homebrew/core):
https://github.com/go-delve/homebrew-delve/issues

These open issues may also help:
Upgrade to delve fails https://github.com/go-delve/homebrew-delve/issues/20
security: SecKeychainSearchCopyNext: The specified item could not be found in the keychain. https://github.com/go-delve/homebrew-delve/issues/19
Mac install error, OS version 10.12.6, go version go1.8.3 https://github.com/go-delve/homebrew-delve/issues/17
The specified item could not be found in the keychain https://github.com/go-delve/homebrew-delve/issues/16
Issue updating to 0.12.2 https://github.com/go-delve/homebrew-delve/issues/12
dlv-cert: no identity found https://github.com/go-delve/homebrew-delve/issues/1
Executable does not get installed on MacOS https://github.com/go-delve/homebrew-delve/issues/18
deps: do not install go if it‘s available on the system https://github.com/go-delve/homebrew-delve/issues/9

　解決方法：

1. cd $HOME/Library/Caches/Homebrew

2. 執行 tar xf delve-*.gz

3 cd 到解壓之後的文件夾路徑中 （我的是 delve-1.0.0-rc.1 ）

4. 執行 sh scripts/gencert.sh

5. 最後在重新 執行 brew install go-delve/delve/delve

一切搞定。安裝成功

mac上 go-delve 安裝出現The specified item could not be found in the keychain 解決方法