Please see the software downloads page for version and OS compatibility.
Note: For users of AJA desktop products on Apple OSX 10.3.9 or OSX 10.4.x Tiger, whose storage is Apple Xserve RAID, we strongly recommend installing the following driver update from Apple:
http://www.apple.com/support/downloads/xserveraiddriver10.html
This is for AJA KONA or Io installations that use Apple Xserve RAID as storage, and are running OSX 10.3.9 or OSX 10.4.x Tiger. This Apple update addresses certain Xserve RAID I/O write issues that have been reported.