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Working with files, terminal and AI on a Mac.
Dual pane file manager: what the second pane buys
Dual pane file manager options for Windows, Mac and Linux, prices checked October 9, 2026, and the three jobs where a second pane beats tabs or two windows.
Duplicate files on a Mac: which copy actually stays
How to find and remove duplicate files on a Mac with Photos, Finder, Terminal and dedicated apps, why some copies free no space at all, and how to pick the copy to keep.
Move files instead of copying them on a Mac
Move files instead of copying them on a Mac: why dragging to another disk leaves the original behind, the four ways to force a move, and what changes underneath.
What actually happens after a duplicate is deleted
What happens when a duplicate file is deleted on a Mac: why free space may not change (APFS clones, hard links), how sync spreads the deletion, and how long it can be undone.
Free duplicate file removers on Mac and what they miss
Free duplicate file removal software on a Mac reports space it cannot free. Here is what APFS clones do to the count, which free tools are still maintained, and a check to run first.
Compare folders and files on a Mac from the command line
A folder compare command answers a different question depending on which one is used. Here is what diff, rsync and checksum lists each measure on macOS, and what none of them can see.
What Finder tags are actually good for
Apple file management on Mac, iPhone and iPad rests on folders, Finder tags, Smart Folders and iCloud Drive. What each one does, where tags get lost, and what to fix first.
The batch command to rename a file, on a Mac
Looking for the batch command to rename a file on a Mac? The Windows one is not here. Build the equivalent, save it as a script, and keep it from overwriting.