Fix 'Your CLT does not support macOS 11' error

Mar 6, 2021

How to fix the Homebrew 'Your CLT does not support macOS 11' error by removing the Command Line Tools and reinstalling them with xcode-select --install.

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I recently got this error while using Homebrew to install a package on macOS, in my case rbenv:

➜ brew install rbenv

...

Error: Your CLT does not support macOS 11.
It is either outdated or was modified.
Please update your CLT or delete it if no updates are available.
Update them from Software Update in System Preferences or run:
  softwareupdate --all --install --force

If that doesn't show you an update run:
  sudo rm -rf /Library/Developer/CommandLineTools
  sudo xcode-select --install

Alternatively, manually download them from:
  ~https://developer.apple.com/download/more/~.

Error: An exception occurred within a child process:
  SystemExit: exit

Weird!

Running softwareupdate --all --install --force as suggested in the message didn’t help, so I ran sudo rm -rf /Library/Developer/ and then sudo xcode-select --install:

xcode-select dialog asking to install command line developer tools with Install and Cancel buttons

Command Line Tools License Agreement dialog with Disagree and Agree buttons

Downloading software progress dialog with a blue progress bar and Stop button

Installation completion dialog showing The software was installed with a Done button

That’s it.

After doing this, brew install rbenv worked fine.

Tagged: Mac · All topics

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