Kevin Purcell is covering in Ministry Tech. This month he has a positive review of Olive Tree's Bible Study 6 for Mac. Olive Tree has been around since at least 2000 and have consistently upgraded there software into a highly capable system. The app is actually available for Windows, Android, iPad, iPhone, Kindle Fire, and Mac. The app is free, and you can get caught a few free resources to get started including the NIV, ESV, HCSB, NET, and more.
While you're at Ministry Tech, keep scrolling to see Purcell's article on Android Bible apps running on Chromebooks. He includes both hardware recommendations and pointers to the Bible apps.