Free space with Finder, one folder at a time

System Settings shows you categories. Finder shows you actual folders. The two work best together: use the Storage screen to learn which category is heavy, then use Finder to find the specific folders responsible and deal with them precisely.

Turn on folder sizes

Open a Finder window, choose View > Show View Options and tick Calculate all sizes. In list view, click the Size column header to sort. Folders rise to the top by weight. This works in any directory: your home folder, Documents, even ~/Library if you navigate there deliberately.

1. Start at your home folderOpen Finder, press Command+Shift+H, and switch to list view with Command+2.
2. Sort by sizeClick the Size column. Your biggest folders are now at the top; that ordering is your priority list for the next twenty minutes.
3. Drill down only where it mattersOpen the largest folder and sort again. Repeat until you reach files rather than folders.
4. Decide per fileUse Quick Look with the space bar to preview before deleting. If a file is the only copy, back it up first.

Clear the Downloads folder properly

Downloads is the highest-yield, lowest-risk folder on most Macs. Open it, sort by size, and look for three patterns: disk image files, installer packages, and compressed archives. Once an installer has done its job it is dead weight; a multi-gigabyte application disk image can sit there for years after the app itself was installed.

Be careful only with saved documents that you never moved elsewhere. Invoices, tickets and scans live happily in Downloads for months and are occasionally the only copy. Quick Look is your friend here: never delete a file you have not opened.

Hunt installers and leftovers with search

Finder’s search can find file types across the whole disk. Open a new window, press Command+F, set the search scope to This Mac, then add criteria: Kind is Disk Image, or a name rule for disk image files. Add a second rule such as Size is greater than 200 MB to ignore small clutter. Sort the results by size and work down the list.

Repeat the exercise for installer packages and disk images. Many people find several gigabytes of installers for apps they stopped using years ago. Deleting an installer does not remove the app it installed; it only removes the ability to reinstall from that file without retrieving it again.

Use the Storage recommendations

Back in System Settings > General > Storage, click each recommendation and read it. “Empty Bin Automatically” is a genuine time-saver. “Review Large Files” builds a table of your heaviest items across the disk and lets you sort by size and date, which is effectively the same workflow you just did in Finder but pre-filtered. “Store in iCloud” moves Desktop and Documents to the cloud and is discussed in chapter 05.

A five-minute weekly routine

• Sort Downloads by size and delete anything you have already used or filed elsewhere.
• Check the Bin and empty it once you are confident nothing needs to come back.
• Open Storage, compare free space with last week, and note anything growing fast.
• Move finished project folders to an external drive or archive rather than deleting them outright.

None of this requires an app, a subscription or an administrator password. It requires one habit: look at the Size column before you look for a solution.