Install Macos On External Drive Jun 2026

Open (Command + Space, then type "Disk Utility"). Click View > Show All Devices . Select the top-level external drive from the sidebar. Click Erase and use these settings: Name: macOS External Format: APFS Scheme: GUID Partition Map Click Erase and wait for the "Done" message. 3. Download the macOS Installer You need the installation files from Apple. App Store: Search for "macOS [Version Name]" and click Get .

This process erases everything on the external drive. Back up your data first. Connect your drive to your Mac. install macos on external drive

Enter your admin password. Your Mac will restart several times. Open (Command + Space, then type "Disk Utility")

Installing macOS on an External SSD/HDD Verdict: Highly recommended for specific use cases, but with critical caveats regarding hardware. Click Erase and use these settings: Name: macOS

– With strong recommendations.

Once the installation is complete, you'll need to restart your Mac and select the external drive as the boot drive. You can do this by:

Before you begin, make sure you have a few things ready: