Saturday, August 4, 2012

Password-Free SSH on OS X Mountain Lion

I had set up my home network with password-free ssh access between various Mac computers. But when I recently upgraded to OS X Mountain Lion, this stopped working.

Turns out /etc/sshd_config is modified during Mountain Lion installation. The following line gets unchecked:

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile      .ssh/authorized_keys

Once I had renamed ~/.ssh/authorized_keys2 to ~/.ssh/authorized_keys on my Mountain Lion computers, everything worked fine again.


  1. This took me days to figure out.. thanks for confirming that something on 10.8 had changed!!

  2. I've linked & resposted.. again may thanks

  3. My Mountain Lion 10.8.2 does not have a ~/.ssh/authorized_keys at all. It does have the known_hosts file.

    In the /etc/sshd_config file, rsa appears to be commented out, but in the ~/.ssh directory there is id_rsa and

    In the known_hosts file there are lots of keys that have ssh-rsa following the ip address.

    What do I put in the authorized_keys file or how do I create it?

  4. Hi,

    You should copy the contents of the ~/.ssh/ file on the computer you want to connect FROM, and paste into ~/.ssh/authorized_keys on the computer you want to connect TO.

    You can create ~/.ssh/authorized_keys if it doesn't already exist.



  5. Gmail also is well supported by online help community and any user can search and read online help forums if he or she faces some issue while using Gmail. Still some of the Gmail users remain unresolved with their issues hence in order to support all of those Gmail users we provide Gmail Customer Service Phone Number 1-844-780-6766 which anyone can call anywhere from the world to resolve their Gmail related issues. Some of the major issues of Gmail 800support