Macos High Sierra 10.13.4 Build 17e199 May 2026
: Supporting the "clamshell" mode (using an eGPU while the MacBook display is closed) and hot-plugging, which allowed for immediate activation without logging out.
The most significant feature of Build 17E199 was the introduction of . This allowed users with Thunderbolt 3-equipped Macs to significantly boost their graphical power for: macOS High Sierra 10.13.4 Build 17E199
The Evolution of the Desktop: macOS High Sierra 10.13.4 (Build 17E199) : Supporting the "clamshell" mode (using an eGPU