Here is a guide how to compare folders in Mac OS using drag and drop. I also show you how to include subdirectories when comparing folders, and how to compare files.

As a online content creator I use a lot of external hardrives, memory cards and other places to store media files. And I copy a lot of files and folders between those volumes. So I often need to compare folders and compare files to see that everything is ok.

There are many situations when you need to compare files or folders in MacOS.

Maybe you need to be certain that a backup is up to date.

Maybe you suspect duplicates and want to make sure that you don’t throw away content that wasn’t duplicate.

Or you have made a huge batch process of files and want to make sure that the batch process didn’t skip any files.

In all those situations it’s convenient to quickly compare folders in mac OS.

There are third party apps for this, but MacOS actually have a very useful and powerful tool that is built in.

I use the terminal for the actual command, but I drag and drop the files from Finder when chosing what folders and files I want to compare.

I use MacOS Mojave but as far as I can recall, you can do this in any version of OS X.

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