Q:

How to use a Mac ssh key in Putty (Windows)?

I have generated a ssh key in the terminal of my Mac. How can I use this private key in Putty on my Windows pc? I don't want to generate a new ssh key for each computer. 

A:

To convert an id_rsa file to an id_rsa.ppk, you can use puttygen from putty's web site.

Choose File->Load Private Key
Enter the private key password if applicable
Press the button Save private key.

The converted key would be saved as "id_rsa.ppk".

