How do you generate a .pem file from an existing .ppk key? Is putty on your mac? Check by running the command puttygen -VWhich will generate a response similar to  puttygen: Release 0.76 Build platform: 64-bit Unix Compiler: clang 12.0.5 (clang-1205.0.22.9) Source commit: 1fd7baa7344bb....Don't have Putty, well easily fixed with homebrew. brew install putty  Generate the key We will use puttygen to generate the key. puttygen key.ppk -O private-openssh -o key.pem key.ppk the...