Ok, let's solve this problem:
An indispensable package manager for homebrew OS X.
/usr/local/cellular is not writable. You should change the ownership and permissions of /usr/local/cellular back to your user account. At this time, just follow its prompt and enter it at the terminal.
Then we will delete these files in the terminal:
terminal input
And then the terminal executes.
Okay, let's pretend.
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