问题解决：dyld: Library not loaded: /System/Library/Frameworks/Ruby.framework/Versions

系统升级到MacOS Catalina 10.15后，MacVim无法使用，报错如下：

dyld: Library not loaded: /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/libruby.2.3.0.dylib
  Referenced from: /usr/local/Cellar/macvim/8.1-153/MacVim.app/Contents/bin/../MacOS/Vim
  Reason: image not found

解决：
法一：通过brew更新MacVim：brew upgrade macvim
法二：重新安装mac vim：brew unlink macvim 然后 brew install macvim --HEAD

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由于网络原因，我在更新过程中遇到brew报错：

Error: Another active Homebrew update process is already in progress.
Please wait for it to finish or terminate it to continue.

解决办法：rm -rf /usr/local/var/homebrew/locks

参考：
MacVim from brew crashes in MacOS Catalina 10.15

Another active Homebrew process is already in progress - Stack Overflow