You can easily Extract or remove Attachment from PST files on Mac using MacUncle PST Attachemnt Extractor.
Use either Add File(s) or Add Folder(s) to upload PST files to the PST Attachment Extractor Tool.
The tool scans all the PST files in the folder and gets the preview of PST files and folders.
Set the desired fileds in Attachment Extractor Option such as Extract Attachment, Remove Attachment, and Extract and Remove Attachment. Along with other Filter Option