macOS storage
macOS storage
System Data, snapshots, Photos, Mail — what fills a Mac and how macOS accounts for it.
macOS storage5 min read
Purgeable space on Mac: what it is and why it counts as used
A plain-language explanation of purgeable space in APFS: what makes it purgeable, why macOS holds onto it, and why df and Finder disagree.
August 8, 2026·Read →
macOS storage5 min read
System Data on Mac: what's inside that mystery slab
A calm breakdown of the System Data category on macOS: what Apple actually puts in it, why it grows, and how to enumerate its contents without guessing.
August 6, 2026·Read →