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https://issues.apache.org/jira/browse/ARROW-11152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17260094#comment-17260094
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Neal Richardson commented on ARROW-11152:
-----------------------------------------
I tried pinning the numpy version but it didn't solve the gcc update problem,
unfortunately.
> [CI][C++] Fix Homebrew numpy installation on macOS builds
> ---------------------------------------------------------
>
> Key: ARROW-11152
> URL: https://issues.apache.org/jira/browse/ARROW-11152
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Continuous Integration
> Reporter: Neal Richardson
> Assignee: Neal Richardson
> Priority: Blocker
> Fix For: 3.0.0
>
>
> Numpy fails to install with homebrew because it tries to upgrade gcc and hits
> a {{brew link}} error. Running {{brew unlink gcc@8 gcc@9}} before {{brew
> install}} could work around this.
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