So we can investigate this and follow up with you go to please turn on 'Enable Logging' in PokerTracker 4 via 'Configure -> Options' and then restart PokerTracker 4.
Reproduce the crash then grab this file before restarting PokerTracker 4 again:
\Users\{Mac Login}\Library\Application Support\PokerTracker 4\Logs\PokerTracker4.logand attach this log file to a
Support Ticket. If you are doing anything specific that leads to the crash then please include details of that in your ticket.