There are times that I forget to bring my iphone with me which prevents me from logging into servers/sites that use 2 steps authentication. Is there a mac version of authenticator that I can install on my mac? I looked everywhere on internet for it, no luck.. I'm hoping someone will point me to right direction.

TIA!

Richard

If there's a version of oathtool for OS X, you could use something like:

oathtool --totp -b secret

where you would replace secret with the shared secret from Google Authenticator in base32 format.

Note that your system's clock must be reasonably accurate to generate valid passcodes.