---
id: mac-storage-basics.what-is-the-sleepimage-file
url: https://storagestudio.us/faq/mac-storage-basics/what-is-the-sleepimage-file
category: "Mac storage basics"
subcategory: "Memory, swap and speed"
question: "What is the sleep image file, and can I delete it?"
alt_questions:
  - "sleepimage mac"
  - "var vm sleepimage size"
  - "delete sleep image file mac"
  - "hibernation file mac"
  - "sleepimage taking space"
short_answer: "A file macOS uses to save memory so the Mac can resume after deep sleep or power loss. It's managed by macOS; don't delete or disable it."
tags: ["sleep", "system data", "memory"]
related: ["https://storagestudio.us/faq/mac-storage-basics/what-are-swap-files-on-a-mac"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# What is the sleep image file, and can I delete it?

The **sleep image** is a file macOS uses to save memory contents so your Mac can resume after deep sleep or a power loss. It's managed by macOS in a protected system area and counted in System Data.

Don't delete or disable it to save space — it's recreated anyway, and turning off hibernation risks losing work if the battery runs out during sleep.