UP主尝试将完整的macOS系统安装到外接存储中，打造随身携带的“便携Mac”。
核心看点：
1. U盘安装翻车：首次使用普通U盘安装，因读写瓶颈和严重发热导致卡死，揭示U盘不适合做系统盘；
2. 外接SSD完美运行：更换为外接SSD后成功安装macOS Sonoma，实测4K视频与Minecraft均十分流畅；
3. 跨设备免重装启动：将硬盘插到另一台不同配置的电脑上，通过修改EFI文件成功免重装启动，数据完美保留。
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原视频标题：I Tried Installing macOS on a USB Drive!
原视频作者：Spec Tech
原视频链接：https://www.youtube.com/watch?v=rbcTu8agvsQ
原视频发布时间：2026-06-29 22:00:14
原视频简介：I Tried Installing macOS on a USB Drive!
Can you run a full desktop operating system from a USB drive? In this video, I try Installing macOS on an external USB drive to find out whether it can work as a portable Mac setup. The idea sounds simple, but Installing macOS outside the internal drive comes with a lot of unexpected challenges.
The goal was to keep my main system untouched while Installing macOS on a separate USB drive. This way, I could test macOS without wiping my existing operating system or risking important files. But as soon as the process started, I realized Installing macOS on external storage is not always as smooth as it sounds.
Throughout the video, I'll walk through the full process of Installing macOS, from preparing the USB drive and creating the installer to choosing the right target disk and fixing boot problems. I also explain what went wrong, what worked, and how long Installing macOS actually took on a USB drive.
After Installing macOS successfully, I tested real-world performance to see if running from USB is practical. I checked boot time, app launch speed, responsiveness, storage performance, and everyday usability. The results were both surprising and frustrating.
This experiment is perfect for anyone curious about Installing macOS without fully committing to it. Whether you're testing compatibility, experimenting with old hardware, or simply trying to create a portable setup, Installing macOS on a USB drive can be useful—but it definitely has limitations.
Watch until the end to see whether Installi...
