The latest generation of Apple Mac Pro computers (Late 2013 “black cylinder” models) are compatible with all Apollo X Rack audio interfaces when using the latest UAD software.

• The latest UAD software is available here. The latest UAD software is compatible with all UA audio interfaces and UAD-2 DSP accelerators.
  
  
• Apollo X rack models with Mac Pro (Late 2013) computers require UAD v9.6.1 Build 62772 or higher. The build number can be found in the System Info panel within the UAD Meter & Control Panel application, as shown in the screenshot below.
  

Apollo X rack models with Mac Pro (Late 2013) models require build number 62772 or higher