Note: UAD-2 SOLO, DUO, and QUAD will not be compatible due to a new PCIe addressing scheme in the new Mac Pros. More details are at the article listed above.
In order to perform the firmware update, you’ll need to use a computer other than the new Mac Pro via firewire or thunderbolt. If you’re using an Apollo, you can use the new Mac Pro to perform the update if you have a thunderbolt to firewire adapter.
From Universal Audio:
As you may know, Apple recently shipped their new flagship Mac Pro models. These new machines are based on all-new PCIe architecture which changes the way they work with UAD-2 and Apollo hardware.
Apollo/Apollo 16 interfaces, UAD-2 Satellites, and the UAD-2 OCTO will be fully qualified to work with the new Mac Pros over Thunderbolt via a UA firmware update in early 2014.
Unfortunately UAD-2 SOLO, DUO, and QUAD PCIe cards cannot be made to work with the new Mac Pros. (See table below for full UAD/Mac compatibility list.)
Importantly, the UAD-2 OCTO PCIe card will require a qualified Thunderbolt-to-PCIe chassis for compatibility with the new Mac Pros. UAD-2 Satellite owners, and Apollo / Apollo 16 owners not using Thunderbolt, will be able to connect to new Mac Pros via an Apple Thunderbolt to FireWire Adapter.
Please read the important information below before connecting any Apollo DUO/QUAD, Apollo 16, and/or UAD-2 OCTO to the new Mac Pro computers (2013 models) from Apple.
A firmware update is required to enable new Mac Pro connectivity