Wait for the patching process. You will see output like:
As Pro Tools 10 was the last version to support the older and RTAS plugin format, 10.3.10 remains the final stable point for users maintaining legacy studios on older Apple hardware. avid pro tools hd 10310 r3 hotfix only for mac top
The internal changelog (Avid reference: PT-2014-10310-R3) lists the following resolved issues: Wait for the patching process
The Avid Virtual Instruments installer was specifically updated for Mac to support Apple's Gatekeeper security feature. : Fixed unexpected quitting when using the "Expand
: Fixed unexpected quitting when using the "Expand to new tracks" command with default match criteria. Gatekeeper Support
: This is the last version to support TDM (HD Accel) hardware , making it a "gold standard" for users who refuse to move to the newer AAX-only systems. User Perspective Pro Tools 10.3.10 Info & Downloads - Knowledge Base
Because the r3 hotfix was Mac-only and never pushed through Avid Application Manager, many users never installed it. Avid’s official download links are now dead, replaced by Knowledge Base articles pointing to “end-of-legacy support.” Community archives (Pro Tools Expert, DUC forums) host mirrored copies, but checksums rarely match.