The Computer Telephone Integration (CTI) Adapter that allows the communication between Cloud for Customer and a soft phone is not supported on Mac.
Please see also help center article SAP Cloud for Customer System and Software Requirements.
More information on Computer Telephony Integration can be found in the Help Center articles:
Computer Telephony Integration
Processing Inbound Phone Calls
Enabling the Live Activity Pane
Creating a Security Certificate for HTTPS Enabled Computer Telephone Integration (CTI)
CTI on MAC , KBA , LOD-CRM-LA , Live Activity , Problem