Pro Tools HD 10 is the last version to support (Time Division Multiplexing) hardware (e.g., HD Accel cards). It also supports the newer HDX and native HD Native systems. If you are maintaining an older studio with vintage TDM rigs (like a Pro Tools|HD 3 Accel system), this hotfix is essential for stability. However, be aware that this software is now considered "abandoned" by Avid. No further support, no new drivers, and no compatibility with macOS Sierra or later exists.
“Four hundred fifty-one degrees?” Marco laughed nervously. “That’s not a CPU temp. That’s the temperature of a crematorium.” avid pro tools hd 10310 r3 hotfix only for mac hot
Installation notes and best practices