在mac终端下执行：brew install glew
结果报错：
Error: Another active Homebrew update process is already in progress.
Please wait for it to finish or terminate it to continue.
解决方法：rm -rf /usr/local/var/homebrew/locks
解决brew报错：Another active Homebrew update process is already in progress
原文：https://www.cnblogs.com/peng-lan/p/11943995.html