How to make Mac icons the same size in all folders?

It is possible to reset all your folders, such that your desired icon size applies to all of them after the reset. To reset the view options across your entire home directory and clear previous custom layout settings, you need to delete the hidden .DS_Store files. These files store folder-specific view choices, and deleting them forces Finder to fall back to your system-wide defaults.

Open your Terminal app (find in Spotlight or Applications > Utilities) and run the following command:

find ~ -name ".DS_Store" -depth -exec rm {} \; ; killall Finder

What this command does:

• find ~: Searches starting from your home directory (~).
• -name ".DS_Store": Targets all hidden configuration files that store folder view properties.
• -depth -exec rm {} \;: Deletes those files safely from the inside out.
• ; killall Finder: Restarts the Finder app immediately so the changes take effect.

Crucial Next Step:

As soon as Finder restarts, you must establish your new default size before opening other folders:

1. Open a brand-new Finder window.
2. Press Cmd + J to open the Show View Options panel.
3. Set the icon size slider to 80x80 (or type it if available).
4. Click Use as Defaults at the bottom of the panel.

Moving forward, Finder will apply this 80x80 layout template to your folders by default since their old, conflicting .DS_Store custom overrides have been wiped out.

More info from Apple: Change how folders are displayed in the Finder on Mac - Apple Support

open any folder

the go to menu bar View>Show view options

adjust size

and make it default

You can use the view options to set your current window to the default, however any windows that have already been open prior to you setting that will retain whatever settings they have, and you will have to adjust them to match your desired view options.

Thanks!

Thanks! It's interesting that they don't have simple solution to adjust icon sizes. Anyway, your answer is helpful!