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I have installed command line tools through Xcode. When I ran xcode-select -p, its showed /Applications/Xcode.app/Contents/Developer.

However, when I ran brew config, it showed CLT: N/A. And when I updated python using brew, it showed Warning: Building python from source: The bottle needs the Apple Command Line Tools to be installed.

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  • Always always state both the version of MacOS and of Xcode, since Apple keeps changing their behavior (and directories, and command-line interface) every coupla versions... Also helps to state your version of brew. Commented Mar 4, 2021 at 21:10

5 Answers 5

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I've got the same issue just now. Running xcode-select --install to reinstall Command Line Tools worked for me, brew config now reports CLT: 7.3.1.0.1.1461711523.

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Seems this needs to happen even if Xcode CLI is installed (Big Sur) - It may be because there is an additional prompt for accepting EULA when running xcode-select --install - haven't tested just accepting it without reinstalling, but the reinstall plus acceptance did fix the issue
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As xcode-select --install did not solve the issue for me:

I had to run brew doctor which listed Warning: Some installed formula are missing dependencies. including a brew install command to fix these. After running that, brew config reported CLT no longer as N/A.

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Unfortunately, this didn't help for me. Seems like Xcode 8.3.3 full install isn't recognized for CLT by homebrew.
neither worked for me , xcode-select --install resulted in 'xcode-select: error: command line tools are already installed, use "Software Update" to install updates ' but there werent any more updates to be installed .
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Use sudo xcode-select --switch path/to/Xcode.app to specify the Xcode that you wish to use for command line developer tools, or use xcode-select --install to install the standalone command line developer tools.

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1

If you've installed the standalone version of the CLI tools (and don't have the full xcode application):

sudo xcode-select --switch /Library/Developer/CommandLineTools

(path courtesy of https://stackoverflow.com/a/40008480/758177)

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For the same dependency issue above, xcode-select --install and clicking "Install" on the pop-up fixes this in MacOS Catalina. Once complete, you can confirm it by typing xcode-select -v in the terminal and the output should look similar to this

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