How to fix curl: (60) SSL certificate: Invalid certificate chain

I get the following error running curl https://npmjs.org/install.sh | sh on Mac OSX 10.9 (Mavericks):

install npm@latest
curl: (60) SSL certificate problem: Invalid certificate chain
More details here: http://curl.haxx.se/docs/sslcerts.html

How do I fix this?

Solution 1:

First off, you should be wary of urls that throw SSL errors. That being said, you can suppress certificate errors in curl with

curl -k https://insecure.url/content-i-really-really-trust

Using the Safari browser (not Chrome, Firefox or Opera) on Mac OS X 10.9 (Mavericks) visit https://registry.npmjs.org

Screenshot of Safari showing certificate error

Click the Show certificate button and then check the checkbox labelled Always trust. Then click Continue and enter your password if required.

Always trust checkbox

Curl should now work with that URL correctly.