You can easily extract IDs Mac OLM files using MacUncle OLM Email Address Extractor. The tool supports Mac OS Machines.
Start MacUncle OLM Email Address Extractor on your Mac Computer
Select one option from Add File(s) or Add Folder(s) to upload OLM file.
Choose requires OLM email files to extract Email ID
Go to Extract on the Above Menu and select Saving Option. Set up the required field on the filter option for selective extraction
Click the OK button to start Email Address Extraction from the OLM file.
In a few moments, the tool opens the location with a resultant CSV file consisting of an OLM email address.