Error: 'zlib' is an invalid command

Question

How can I run this command in OSX?

dd if=mybackup.ab bs=24 skip=1|openssl zlib -d > mybackup.tar

When I run this I get the following errors <

Answer 1

Just fix it

Get latest version from OpenSSL Official Repo.

$ wget https://www.openssl.org/source/openssl-1.1.0e.tar.gz
$ tar -zxvf openssl-1.1.0e.tar.gz
$ cd openssl-1.1.0e

Configure OpenSSL with zlib support

$ ./config zlib
$ make 
$ sudo make install

Happy days

$ which openssl
/usr/local/bin/openssl