Merging folders on a Mac
Tried to find a nice GUI way to merge folders on my Mac. After searching, I discovered that I wasn’t missing something - the Finder doesn’t support merging folder contents. I didn’t want to buy one of the many available Finder extensions (since I’m naturally cheap). And I didn’t want to go through setting up Unison (which I have used for more heavy-lifting, including remote backups/copies – it does work well) for a potentially one-off solution. So I found a few command-line options described (with examples) at 456bereastreet.com.