Unfortunately, the Pangu tool was only available for use by Windows users, or folks using a virtual machine on Mac. However, on Wednesday the Pangu team released a version of the tool with OS X support.
The Pangu tool still currently only supports iOS 9, 9.0.1, and 9.0.2 firmwares. There has been talk of a Pangu release for iOS 9.1, but nothing has been confirmed by the team.
Download the latest version of Pangu for Mac or Windows directly from the team.