Kudos to Zoopercat for the helpful post. I'd like to add some information to that.
There is no need to use "better" unzip tool because macOS does that just fine. Should you be looking a tool to pack and unpack multiple archive formats then have a look at Keka which is way better than Unarchiver. http://www.kekaosx.com
To find out your OpenSSL version, open Terminal and enter the command
If you have
OpenSSL 0.9.8zh 14 Jan 2016 then you need an update.
Standard macOS installations don't come with Homebrew and if you probably won't have it, but you can install it with a single command in Terminal:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Further information about Homebrew is available at their website https://brew.sh
After that use the commands yellowfive wrote in his reply.
brew install openssl
mkdir -p /usr/local/lib
ln -s /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib /usr/local/lib/
ln -s /usr/local/opt/openssl/lib/libssl.1.0.0.dylib /usr/local/lib/
If you get a warning try the same commands but replace
brew install openssl
brew install --force openssl
Kudos to yellowfive for correctly pointing this out.
You should always have your security settings set to allow only apps signed by an Apple "identified developer" to be run. The first time you run the Ask Mr. Robot app (or any other unsigned app) simply right-click it and then click "Open" in the context menu. This will give you a dialog informing you that's it's an unsigned app and asking your permission to allow macOS to open the app. You only need to do this the first time you start the app. macOS will remember this and subsequently you can start the app by double-clicking it. No drag&drop necessary. Do NOT change your security settings to allow apps not signed by an Apple "identified developer" to be run. This is really serious and can not be over-emphasized. Keep your system secure and never let anybody talk you into lowering your security settings.
Edit: Typo fixed. Paragraph about security settings added.