How to live with a 256 GB Mac without fighting it every week

On a 256 GB Mac, macOS and a normal set of applications take a substantial share before you have saved anything. That is not a fault, it is the arithmetic, and the difference between a small Mac that works and one that nags you weekly is four decisions made once rather than twenty small cleanups.

Decision one: where the photo library lives

A photo library is the biggest personal folder on most Macs and it only grows. The options are to keep it local and accept the space, to turn on the option that keeps smaller versions locally and full resolution in iCloud, or to move the library to an external drive.

All three are reasonable, and the trap is doing none of them and letting it grow until the disk is full. What the Photos library actually holds covers the sizes, and moving one to an external drive covers the Option launch step that catches people out.

Decision two: stop syncing everything

Every sync service defaults to a full local copy. On a small drive that is the single most valuable setting to change, because it converts a permanent cost into an on demand one.

du -sh ~/Library/CloudStorage/* ~/Dropbox* 2>/dev/null | sort -h

Turn on streaming or online only files in each client, as covered in what sync folders keep locally.

Decision three: one external drive, used properly

A small fast external drive costs less than one upgrade tier from Apple and holds more. Archive finished work, video projects and virtual machines there, and keep the internal drive for what you are working on this month.

The cost comparison, priced with a check date, is in iCloud storage against an external drive. The short version is that the cheapest option is usually reclaiming what you already have, and after that a drive is cheaper than years of subscription.

Decision four: know your own three

On any given Mac, three folders account for most of the growth, and they are different per person. Find yours once:

du -xh -d 1 ~ 2>/dev/null | sort -h | tail -10

For a developer it is usually project folders and caches. For a photographer it is the library. For someone who works with video it is exports they have already delivered. Knowing which three saves you from checking twenty.

The maintenance that is actually needed

• Empty the Trash, including on external drives.
• Clear Downloads, which is the easiest space on any Mac.
• Delete old device backups after a new phone has settled in.
• Check the three folders you identified above.