How Much Space does macOS Take on Your Mac?

Understanding macOS Storage Requirements: A Comprehensive Guide

macOS, your Mac's operating system, consumes a significant portion of your hard drive or SSD. Knowing the storage needs of macOS helps you determine the necessary space during and after installation, and aids in planning a new Mac purchase. Knowing the OS footprint allows for informed decisions about storage capacity (128-256GB vs. larger drives). Even without a new Mac purchase, understanding typical macOS space usage helps assess system health. Modern versions shouldn't exceed 25GB; significantly more suggests a problem requiring attention.

This guide details average macOS storage requirements per version:

• macOS Sequoia (15): Approximately 25GB (installer: 12.1GB; requires at least 25GB free space, 30GB recommended). Minimum upgrade requirement: High Sierra (2017 iMac Pro and certain other models).
• macOS Sonoma (14): Approximately 25GB (installer: 12.1GB; requires at least 28GB free space, more recommended). Minimum upgrade requirement: High Sierra (10.13).
• macOS Ventura (13): 14GB to 19GB (installer: 12.19GB; requires an additional 25GB for installation, totaling 37GB).
• macOS Monterey (12): 15.24GB to 20.24GB (installer: 12.16GB; requires 22GB for upgrades from macOS Sierra or later, 44GB from OS X El Capitan or earlier).
• macOS Big Sur (11): 14.94GB to 19.94GB (installer: 12.23GB; requires 35.5GB free space for upgrades from macOS Sierra or later, 44.5GB from OS X El Capitan or earlier).
• Older macOS Versions (10.15 Catalina and earlier): 8.8GB to 18.5GB, depending on the version and upgrade source. (Installers are smaller, but additional space is needed for installation).

Storage requirements are consistent across Apple Silicon and Intel Macs.

Note: These figures represent minimum requirements. Always aim for more free space to ensure optimal performance and prevent potential issues. Minor updates (point releases) typically require 2-5GB additional space. Check your Mac's storage via System Settings > General > Storage. Low disk space can impact performance; consider using cleanup utilities to free up space if needed.

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