Command Line Tools not working - OS X El Capitan,

Question

I just upgraded from Yosemite to El Capitan (and replicated the problem upgrading from El Capitan to Sierra), and when I try to type for example git status inside a terminal, I get the following error:

xcrun: error: invalid active developer path
 (/Library/Developer/CommandLineTools), missing xcrun at:
 /Library/Developer/CommandLineTools/usr/bin/xcrun

I don't have Xcode installed, never did. Anyone have a solution?

Answer 1

After update to macOS 10.13.3

After updating do macOS 10.13, I had to install "Command Line Tools (macOS 10.13) for Xcode 9.3" downloaded from https://developer.apple.com/download/more/

Answer 2

Even if you do xcode-select --install it was not fixing that for me as it showed some network error. The problem was that it could not connect to the app store. I did the following to fix it.

1. Open keystore
2. Go to system root and select certificates.
3. Open digicert high assurance EV.
4. Expand the trust section, mark it as never trust.
5. Restart system now repeat step 1, 2, 3. and mark the trust policy as back to use system defaults.

Your app store should work now and you should be able to run xcode-select --install