How do I disable the warning Chrome gives if a security certificate is not trusted?

You can tell Chrome to ignore all SSL errors by passing the following at the command line:

--ignore-certificate-errors

I start Chrome from bash using this:

/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --ignore-certificate-errors &> /dev/null &

and it works great. Note that this should only be used for testing development websites, and should not be used by a typical end user.

Why? Because Chrome won't say anything about bad certs on "real" sites too! So only use this if you are a developer!

If you just want this for local SSL certificates, then you may be able to get away with just using this option in Chrome, allow-insecure-localhost:

chrome://flags/#allow-insecure-localhost

On a related note, if you want to create fully trusted self signed SSL certs for Chrome/Safari, you can find out how to do that here

sippa,
When you use Chrome's Options > Manage Certificates > Import where are you placing the certificate? On the "Certificate Store" screen of the import, choose "Place all certificates in the following store" and browse for "Trusted Root Certification Authorities." Restart Chrome. This normally works for me.

You can avoid the message for trusted sites by installing the certificate.

This can be done by clicking on the warning icon in the address bar, then click

"Certificate Information" -> Details Tab -> Copy to file

Save the certificate, then double click on the certificate file. On the certificate window that opens, click install certificate, then walk through the install.

The next time you go to the site it should work fine without errors.