
I weight the issues of cost/complexity/frequency of use before I take on new software.

I’ve generally avoided add-ons as I try to keep things as vanilla as possible to forestall problems. To do this, click on the Size column in the File Explorer window.

Sort by size: To help identify duplicates, sort the files in the folder by size. This could be your entire hard drive or a specific folder on your computer. UPDATE: see Quick Look: A Better Finder Rename. Select the folder you want to search: Navigate to the folder where you want to find duplicate files. MPG: I have not looked into these products, but a quick look suggests they are vastly superior to the macOS Finder. They’re not free like the Finder feature, but are vastly more capable. The ‘Big Mean Folder Machine’ is also a good app when managing large hierarchical libraries: It’s great for OCD file organization.(After using it in trial mode I was impressed enough to buy the ‘Forever Upgrade’ a number of years ago, and have benefitted ever since.)

I have used it for normalizing many filenames (thousands at a time) from disparate sources, along with folder names. It’s a fantastically-capable batch processor. I think including the word ‘Finder’ in the app name makes it sound like it’s some sort of extension. Select library Files and Folders -> drag Get Folder Contents action, and drop below the previous action. If you don’t already use it, I highly recommend ‘A Better Finder Rename’: Renaming files to include date and time Don H writes:
