do I just copy my brush and shortcut and custom workspaces presets into mac from PC then locate them from within mac photoshop preset manager, and will that effectively place a copy within my presets folder?
See this link to learn how to migrate, export, and import presets:
FAQ: How do I migrate my saved presets from an earlier version of Photoshop or import/export them?
I managed to do this
importing brushes, customer shortcuts, and workspaces from pcCS5 to macCS6.
Retrieving data ...