Before we said，As the domestic network was further bad，use brew AlsoReplace domestic universities mirror source，But this method palliatives，An update is faster，But still the same download。
The result was the most updates need to download the source code and compiled locally，Luck almost altogether also download the source code is not down，Cancel every time and try again，Constantly repeated manual。
- If we can go Agent Terminal Command[……]
In use brew when，Often you will encounter all kinds of weird errors，Such as updating time often encountered：
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fatal: git-write-tree: error building trees Cannot save the current index state Error: Failure while executing: git stash save --include-untracked --quiet |
and this：
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Error: Failure while executing: git pull --ff --no-rebase --quiet origin refs/heads/master:refs/remotes/origin/master |
Experiencing these problems，Eighty per cent of your brew directory permissions error。
Use the following command to repair[……]