Software Discovery on MAC in BigFix Inventory does not depends on the Scanner / CIT. So it is not related to Hardware Inventory Scanner not supported for MAC OS any longer?
There is needed to execute the Initiate Software Scan on the Mac and have activated the Installed Unix Package Analysis.
This should be sufficient that on Package Data there are listed packaged for the Mac computers.
Then during import there are created catalog signatures automatically to report the software on the Software Classification. This can be disabled via /management/feature and option called “Automatically generate signatures for software installed on Mac computers”, so worth to check if is checked when Packaged Data is there but no software.
When Package Data is missing - check the Unix Package Data analysis result on the BigFix Console side. If not there check analysis activation, last execution status of Initiate Software Scan (if was successful, review also Software Scan Status analysis).