Oka Unarchiver PRO 2.1.13 for Mac Oka Unarchiver is a small, easy-to-use utility that can archive and unarchive various files. With Oka Unarchiver, you can compress as many files as you want. You can also password-protect them.   Additionally, Oka Unarchiver for Mac can extract a wide range of compressed files, from ZIP to 7Z