brew install opencv@2 时报错 Error: Can't create update lock in /usr/local/var/homebrew/locks!

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解决方案，报错里已经说明了：

我的解决方案：

sudo chown -R "$USER":admin /usr/local

 

stackoverflow上的答案
I was able to solve the problem by using chown
on the folder:
sudo chown -R "$USER":admin /usr/local
Also you'll (most probably) have to do the same on /Library/Caches/Homebrew
:
sudo chown -R "$USER":admin /Library/Caches/Homebrew

 

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