'convert .pem to .ppk on macos

There are lots of SO posts on this topic but most of them are for Windows and use the GUI. All others posts seem to use the CLI.

Is there a GUI version of puttygen on MacOS/Linux and if so instructions on how to install/use? The CLI seems to give me an error. 

Usage: puttygen ( keyfile | -t type [ -b bits ] )
                [ -C comment ] [ -P ] [ -q ]
                [ -o output-keyfile ] [ -O type | -l | -L | -p ]


>puttygen mykey.pem -t rsa -b 2048 -o mykey.ppk
puttygen: cannot both load and generate a key

Is there something wrong with my commands?

linuxputtyprivate-keypemkey-pair


Solution 1:[1]

AFAIK, there is no GUI for putty versions of OSX.

You can simply convert your key like this: puttygen mykey.pem -o mykey.ppk

Solution 2:[2]

Now you should type

puttygen Fishidentification.pem -o fishkey.ppk --ppk-param version=2

Because Putty/FileZilla ssh client applied PPK format version 2 not version 3. If you did not add the parameter --ppk-param version=2, puttygen will generate ppk file as PPK format 3 as default. The error message is shown below:

FATAL ERROR: No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)

Solution 3:[3]

you can convert like this puttygen -t rsa -C name.pem -o name.ppk

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 smaftoul
Solution 2 Chitsai Yeh
Solution 3 Lackson Munthali

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