Runic Games announces the Mac OS X edition of Torchlight II is now available on Steam. Here's word on the think different version of the action/RPG sequel, and how it can be played online along with the Windows edition:

Mac gaming enthusiasts will find Torchlight II available on Steam this morning, launching with a very special 80% off sale. Torchlight II for Mac will regularly retail for $19.99 after the sale.

Players who already purchased Torchlight II for the PC on Steam will find the Mac version available to them at no extra charge. In addition, if players purchased non-Steam versions of Torchlight II, they will be able to redeem those keys on Steam to get the complimentary Mac version.

“It is our great pleasure to finally be releasing Torchlight II for the Mac. Although it’s been a long time coming, we hope you agree that it is worth the wait,” stated CEO Max Schaefer.

Mac and PC users will be able to play multiplayer together, regardless of their preferred platform. Existing users will also be able to carry their character over to the new Mac version of the game if desired.