– Due to severe performance issues experienced during testing, Mac OS X 10.11.4 and 10.11.5 are not and will not be qualified for Pro Tools. The latest supported update to OS X El Capitan is OSX 10.11.3. See links below for system requirements details.
– Avid announced full support of Windows 10 with Pro Tools 12.5, see following links for qualification: Pro Tools HD 12 System Requirements, Pro Tools 12 System Requirements, Pro Tools Operating System Compatibility Chart
– New drivers available for Eleven Rack, Digi 002, Digi 003, Mbox, Mbox Mini, Mbox Pro, Fast Track C400 and Fast Track C600.