Install Macos On External Drive

Hold the Option key (Intel) or Power button (Apple Silicon) during startup to choose your drive.

: Plug your drive into any compatible Mac and boot directly into your personalized environment with all your files and settings intact. install macos on external drive

Installing macOS on an External SSD/HDD Verdict: Highly recommended for specific use cases, but with critical caveats regarding hardware. Hold the Option key (Intel) or Power button