Due to restrictions in access to external binaries, final version 1.1.0 and newer has no RAR compression support but you can (at your own risk) remove Keka's signature and run it un-sandboxed with RAR support.

Without sandbox, Keka supports RAR compression if the rar binary is found on your machine.

If you don't have the binary on your machine, you can download a trial version here or buy the full version here.

Note you'll need the command line version compiled for Mac OS X/macOS.

The paths that can be used are these:

• /bin/rar
• /usr/local/bin/rar
• ~/bin/rar

cp <DOWNLOADED_PATH/rar> /usr/local/bin/

brew cask install rar

Remember to restart Keka.

Many thanks to Alexander Roshal and the RARLAB team for it's great work.

Note you'll need to do this every time you update Keka. This is an unsupported feature so run it at your own risk. If you have issues with this step, be sure to try with the web version and not the App Store version.

Simply execute this command in the Terminal:

codesign --force --deep --sign - /Applications/Keka.app

In case this command fails with "resource fork, Finder information, or similar detritus not allowed", execute this first:

/usr/bin/xattr -cr /Applications/Keka.app

Keka will now run un-sandboxed and will be able to run your own rar binary.